1 Dwarf shrubs < 1 dm tall; inflorescence congested; fruits dry, separating into 4 ovoid nutlet shorter than 5 mm long; leaves with upper surface bulging between the veins

1 Trees or shrubs; inflorescence branched and usually not congested, rarely few-flowered; fruits drupaceous at least when young, rarely schizocarpous (Bourreria), then each mericarpid longer 5 mm; leaves planar.

  2 Calyx imbricate in bud; fruits 3-8 mm long, with 2-4 pyrene, abaxially usually not lamellate

1 Leaves evergreen.

  2 Leaves 1-7 mm long, either acicular and spreading or ovate and appressed to the stems

  2 Leaves > 10 mm long.

    3 Leaves linear, > 15× as long as wide, usually sharply pointed at the apices (Ilex can have pointed apices, but leaves are not linear and marginal teeth often also present); [Monocot]

    3 Leaves broader, < 15× as long as wide, leaf apices variously shaped, if pointed usually not conspicuously sharpened; [Eudicot, Basal Angiosperm, or Monocot].

      4 Plant a creeping subshrub, < 1 dm tall

      4 Plant not creeping, > 3 dm tall (mature plants).

        5 Inflorescence an involucrate head or a raceme or a panicle consisting of spherical heads (Conocarpus in COMBRETACEAE).

          6 Inflorescence an involucrate head, the heads consisting of a receptacle bearing few-many cypselae; plants of various habitats, but not forming dense stands of shrubs in coastal habitats

          6 Inflorescence a raceme or panicle consisting of spherical heads, the fruit densely clustered in conelike heads but not cypselae; leaf abaxial surfaces with conspicuous pit domatia at the junction of midvein and secondary vein; plants salt-adapted shrubs of coastal habitats

        5 Inflorescence not an involucrate head, instead either solitary (Illicium in ILLICIACEAE) or variously branched, spicate, racemose, umbellate, or fascicled.

             7 Flowers with a 5-lobed, fan-shaped corolla opposing a conspicuously protruding and incurved style

             7 Flowers various, but not as above.

               8 Leaves alternate, but usually clustered densely towards branch tips; leaves narrowly oblanceolate, 1-4 cm long; flowers yellow, 5-merous, the petal diminuitive (ca. 4 mm) and clawed basally (the petal often falling off by midday); [of coastal beaches, dune, and hammocks; FL peninsula]

               8 Plants not with the above combination of traits: leaves longer and variously shaped (if narrowly oblanceolate, leaves much longer than 40 cm long) usually well-spaced throughout the stems (if clustered, then other characters lacking); [plants widely distributed in a variety of habitats].

                 9 Carpel separate; fruit an aggregate; fresh foliage strongly fragrant; [Basal Angiosperm].

                   10 Fruit an aggregate of woody follicle arranged in a whorl

                   10 Fruit an aggregate of red to blackish berries, 4-6 mm long, each on a long stipe, giving the aggregate almost the appearance of an umbel

                 9 Carpel fused; fruit a berry, drupe, acorn (nut), capsule, or legume; fresh foliage not strongly fragrant; [Eudicot, Monocot, and Basal Angiosperm].

                     11 Ovary with 3 carpel; fruit a berry; “leaves” actually cladode; [Monocot]

                     11 Ovary with 1, 2, 3, 4, or 5 carpel; fruit a berry, drupe, capsule, legume, or nut; leaves actually leaves; [Eudicot and Basal Angiosperm].

                       12 Leaves largely covered with silver and/or bronze lepidote scale and/or dense stellate hair below (visible at 10× or higher magnification), giving the lower leaf surface a slightly shiny to almost metallic appearance.

                          13 Petal present, conspicuous, connate, white, the corolla rotate; fruit a berry with several seeds; fresh foliage with a strong, tar-like odor

                          13 Petal absent or inconspicuous, greenish and separate if present (note that the calyx is petaloid and white or yellowish in Elaeagnus of ELAEAGNACEAE); fruit a dry capsule with 3 seeds, or a drupe with a single seed; fresh foliage lacking a strong odor.

                            14 Perianth 4-merous; petal absent; petaloid sepal white to cream, fused and salverform; carpel 1; fruit a fleshy, red drupe, with a single seed

                            14 Perianth 5-merous; petal green and separate, or absent; sepal greenish, separate; carpel 3; fruit a 3-valved capsule with 3 seeds

                       12 Leaves with various vestiture (or glabrous), but not as above.

                              15 Flowers arranged in axillary spike, umbel of shortened spike, or sometimes the flowers solitary and leaf-opposing; fruit a drupe or drupe-like.

                                16 Flowers in spike, axillary umbel (of shortened spike), or the flowers solitary and leaf-opposing; leaves spaced, the base oblique; stipule apparent, and clasping the stem; fruit rarely 3-angled (P. auritum), but not ridged; plants unarmed, the stems swollen at the node; branches somewhat zig-zagged, not arranged in conspicuous tiers

                                16 Flowers arranged in axillary spike only; the fruit usually somewhat ridged; leaves clustered at branch tips (except T. arjuna), the base typically cuneate; stipule reduced to glandular hair at petiole base; plants armed or unarmed, the stem node not conspicuously swollen; branches arranged in tiers, the main branches erect, the lateral spreading horizontally

                              15 Flowers in other types of inflorescence, not spike, if the inflorescence axillary only, then consisting of panicle or raceme (Cestrum) or subsessile to sessile fascicle (Myrsine and SAPOTACEAE); fruit various (acorn, berries, drupe, capsule, legume).

                                  17 Leaves 1-foliolate on the upper stems, sometimes 3-foliolate below, or all reduced to phyllodial spine; flowers papilionaceous, bright yellow; fruit a legume; stems bright green

                                  17 Leaves simple throughout; flowers variously shaped but not papilionaceous; fruit not a legume, instead acorn, berries, capsule, or drupe.

                                    18 Flowers apetalous; arranged in catkin (Quercus in FAGACEAE; Morella inodora in MYRICACEAE) OR thyrse (Dodonaea in SAPINDACEAE).

                                       19 Flowers tannish, borne in catkin (these drooping at maturity); fruit a nut in a cupule (acorn)

                                       19 Flowers greenish-red or yellowish-green, borne in thyrse or if in catkin (Morella), these erect and globose in shape; fruit a winged, bladder-like capsule (Dodonaea) or globose, drupe-like, and covered in small, warty protuberance (Morella).

                                         20 Fruit a bladder-like, winged capsule (usually weakly 3-locular), brownish-red or brown when ripened; [peninsular FL from St. Johns County southward]

                                         20 Fruit globose, drupe-like, and covered in small, warty protuberance, blueish purple to black when ripened; [Gulf Coastal Plain from FL Panhandle and sc. GA, w. to e. LA]

                                    18 Flowers not apetalous, with a well-developed corolla, variously colored (white, cream, pink, greenish or reddish-orange), either urceolate OR tubular and with separate and spreading petal (rarely the perianth only consisting of green sepal), arranged in various terminal or axillary inflorescence, or sometimes solitary; fruit either a (3-) 5-valved capsule, or a spherical berry with (1-) 10+ seeds, OR a 1-8 seeded dry or fleshy drupe.

                                           21 Flowers white to pink or reddish-orange, rotate, tubular, or urceolate (the petal also sometimes spreading apically, but united at least basally), in various terminal or axillary inflorescence or solitary; fruit either a 2-5 valved capsule (conspicuously linear-cylindric in CAPPARACEAE), a spherical berry with 10+ seeds OR a drupe bearing 4 bony nutlet (Bourreria).

                                             22 Flowers reddish-orange; corolla bearing post-staminal hair (appearing as tufts of hair opposite each anther)

                                             22 Flowers white, greenish-white, yellow, or pink; corolla without obvious tufts of hair opposite each anther.

                                               23 Fruit a fleshy berry; inflorescence of axillary fascicle (SAPOTACEAE), axillary and paniculate (Cestrum) or in Solanum, leaf-opposed and variously arranged (terminal, axillary, and extra-axillary).

                                                 24 Plants with milky sap (exuded from petiole when removed from stems); sepal rusty-tomentose; [c. and s. FL only in our area].

                                                    25 Fruit a smaller, glabrous berry (< 1 cm in diameter), green, purple, or black, glabrous, not roughened; petiole not with a decurrent adaxial wing forming a groove

                                                    25 Fruit a large, globose berry (2-8 cm in diameter), pale brown in color when mature, the surface roughened in texture; petiole with a decurrent, adaxial wing forming a groove

                                                 24 Plants not exuding milky sap; sepal variously glabrous or tomentose, but not rusty-tomentose.

                                                      26 Leaves 1 per node; inflorescence axillary and paniculate (sometimes with terminal flower clusters present), never leaf opposed (although often bracteate); flowers tubular, the end of the tube often surrounding the anther

                                                      26 Leaves 1 per node or also paired (on one side of the stem) at some node (the leaves then uneven in size); inflorescence leaf-opposed; flowers campanulate, lacking a tubular corolla

                                               23 Fruit not a fleshy berry, instead a valved capsule or a drupe bearing 4 bony nutlet (Bourreria); inflorescence terminal or axillary (or occasionally flowers solitary), never leaf-opposed.

                                                        27 Capsule pendulous and conspicuously elongate-cylindric, borne on a slender gynophore (a specialized stipe bearing the gynoecium); seeds white, grey, tan, or brownish in color and usually contrasting with the bright red interior of the capsule; plants shrubs or sometimes loosely scrambling over other plants; stamen usually much longer than the petal and conspicuously exerted from the flowers

                                                        27 Capsule (or drupe) erect, not linear nor long-cylindric, not borne on a gynophore; seeds variously colored, and sometimes surrounded by a fleshy aril (but the entire capsule interior not bright red); plants shrubs; stamen shorter than or only minimally longer than the corolla (not long exerted)

                                                          28 Seeds without fleshy aril or attachment; ovaries 5-10 carpellate; flowers urceolate; leaves serrate or entire

                                                          28 Seeds with fleshy aril or attachment (or if not fleshy, the seeds nutlet with abaxial ridges, as in Bourreria); ovaries 2-4 carpellate; flowers rotate; leaves entire or very remotely serrulate.

                                                            29 Fruit a capsule (the seeds with fleshy aril or attachments); flowers rotate, but not salverform (the corolla tube not lengthened), arranged solitary, few, or in cyme, terminal or axillary, the corolla lobe usually deltoid or somewhat triangular in shape; leaves glabrous or sometimes puberulent (Pittosporum), but the pubescence not rough.

                                                              30 Flowers few, not showy, green to greenish-white, inflorescence not densely arranged (flowers also sometimes solitary); capsule not beaked; leaves not revolute or undulate

                                                              30 Flowers numerous, showy, white; inflorescence densely arranged; capsule with short beak; leaf margin revolute or slightly undulate

                                           21 Flowers white, rotate, the petal spreading, distinct (i.e., separate to the base; nearly so in Myrsine), not tubular; arranged in axillary fascicle or raceme or in subsessile to sessile axillary fascicle (Myrsine); fruit either a fleshy drupe with 4-8 pyrene, or a dry to leathery single-seeded drupe.

                                                                 31 Plants sometimes with pneumatophores; leaf blade with apical and pit-domatia present; [non-native, s. FL]

                                                                 31 Plants never producing pneumatophores; leaf blade variously pubescent or glandular, but lacking conspcuous marginal or apical pit-domatia; [collectively widespread natives]

                                                                   32 Shrub rhizomatous and colonial; fruit an ellipsoid drupe, 2-3 cm long

                                                                   32 Shrub not rhizomatous; fruit either a fleshy or dry drupe, < 1 cm long.

                                                                     33 Inflorescence an axillary fascicle or cluster, the fascicle short-pedicellate, subsessile, or sessile

                                                                       34 Inflorescence of sessile or subsessile fascicle, the flowers 5-merous, greenish-white (often with pink streaks or dots) and with obvious staminode; fruit a 1-seeded fleshy to leathery drupe

                                                                       34 Inflorescence of subsessile or short-pedicellate fascicle, the flowers 4-merous, white (lacking pink streaks or dots); fruit a fleshy drupe with 4-8 pyrene

                                                                     33 Inflorescence an axillary raceme; fruit a dry drupe with 1 seed

1 Leaves deciduous.

                                                                         35 Inflorescence an involucrate head

                                                                         35 Inflorescence branched, spicate, a catkin, or consisting of a solitary flower or axillary clusters or whorl, not an involucrate head.

                                                                           36 Inflorescence a catkin; flowers unisexual; plants dioecious

                                                                              37 Leaves 3.5-6 cm wide

                                                                              37 Leaves < 3 cm wide

                                                                           36 Inflorescence various, not a catkin; flowers bisexual; plants hermaphroditic.

                                                                                38 Inflorescence consisting of solitary, axillary flowers

                                                                                  39 Fruit a globose, spinose capsule bearing a longitudinal ridge across 1 or both faces, thus essentially resembling a spikey ball; perianth (4-)5-merous, consisting of 3 upper connate petaloid claw and two lower sessile petal; fresh plants without a strange musky odor; [Eudicot]

                                                                                  39 Fruit an oblong berry, greenish-yellow when ripe, not bearing small spine; perianth 3-4-merous, without connate petaloid claw; fresh plants fragrant with a strange, musky odor; [Basal Angiosperm]

                                                                                38 Inflorescence of 2 or more flowers; perianth 3-5-merous; fresh plants not musky-fragrant; fruits various, not as above.

                                                                                    40 Flowers 3-merous; fruit fleshy, red or greenish-yellow at maturity; ovary superior; [Basal Angiosperm or Eudicot].

                                                                                      41 Leaves elliptic or narrowly elliptic, broadest near the middle; fresh plants strongly fragrant with a citrus-like aroma; stems unarmed; fruit a drupe, with a single seed

                                                                                      41 Leaves obovate or oblanceolate, broadest near the apex; stems armed with nodal spine; fresh plants not fragrant; fruit a berry, with several seeds.

                                                                                    40 Flowers 4-5-merous; fruit fleshy or dry, black, blue, brown, tan, or red at maturity; ovary superior or inferior; [Eudicot].

                                                                                        42 Fruit a 4-5-valved capsule with many seeds; inflorescence either terminal, a corymb or panicle, or an axillary whorl

                                                                                        42 Fruit either a drupe or berry (indehiscent, and variously fleshy or dry) or a dry 3-valved capsule with 1 seed; inflorescence axillary (solitary, clusters, fascicle, or raceme), or in a terminal raceme (Pyrularia in SANTALACEAE).

                                                                                           43 Leaves largely covered with silver and/or bronze shiny lepidote scale below, giving the lower leaf surface an almost metallic appearance

                                                                                           43 Leaves with various vestiture, but not as above.

                                                                                             44 Ovary inferior or half-inferior; inflorescence an axillary cluster or raceme, or a terminal raceme.

                                                                                               45 Fruit a spherical berry, with 10 or more seeds

                                                                                               45 Fruit an elongate drupe (definitely longer than thick), with 1 seed.

                                                                                                 46 Fruit 15-30 mm long; inflorescence a terminal raceme

                                                                                                 46 Fruit 6-10 mm long; inflorescence an axillary fascicle

                                                                                             44 Ovary superior; inflorescence an axillary cluster or an axillary raceme (borne themselves in clusters).

                                                                                                   47 Fruits elongate, 8-20 mm long.

                                                                                                     48 Fruit a red or orange berry, 8-20 mm long; leaves usually on spur-shoots; [salty coastal areas, or exotic of disturbed situations]

                                                                                                     48 Fruit a yellowish-green drupe, 12-15 mm long; leaves on main stems; [rich forests, mainly inland]

                                                                                                   47 Fruits spherical, < 10 mm long.

                                                                                                        49 Inflorescence a narrowly cylindrical raceme, clustered several to many at the tip of the previous year’s wood and below the current season’s growth; fruit < 3 mm in diameter

                                                                                                        49 Inflorescence an axillary cluster; fruit > 4 mm in diameter

                                                                                                          50 Fruit dry, opening by 3 valve, 1-seeded; leaf pubescence stellate

                                                                                                          50 Fruit fleshy, with 4-8 seeds; leaf pubescence simple or absent.

                                                                                                            51 Fruit yellow to red, the pedicel 10-30 mm long; leaf venation pinnate, but irregular and reticulated

                                                                                                            51 Fruit dark red to black, the pedicel < 10 mm long; leaf venation very neatly pinnate, with the secondary vein nearly straight and parallel to one another

1 Leaves evergreen.

  2 Leaves tiny, scale-like, broadest at the base and more or less clasping the stem, < 10 mm long and < 1 mm wide

  2 Leaves larger and broader, > 40 mm long and > 8 mm wide.

    3 Fruit a hesperidium; petiole flanged or winged for most of its length (except C. reticulata, which sometimes lacks wings entirely), constricted at the base of the blade (except linear in C. medica)

    3 Fruit various (but not a hesperidium); petiole linear (sometimes swollen, but not flanged nor winged with leafy tissue).

      4 Leaves pubescent with stellate hair, rufous 2-branched hair or peltate scale (these sometimes also mixed with simple hair), OR leaves with glandular punctae, these appearing as translucent dots (best seen on lower leaf surfaces, with at least 10x magnification).

        5 Fruit an elongate-cylindric and pendulous capsule, borne on a slender gynophore; stamen usually much longer than the broadened petal and conspicuously exerted from the flowers

        5 Fruit not as above, instead an acorn (Quercus), a subglobose to ellipsoid berry (SAPOTACEAE), or a fleshy drupe (Elaeagnus); stamen not long exerted from the flowers, or if so, then the flowers apetalous (Melaleuca).

          6 Leaves (when fresh) strongly odorous, glandular-punctate (appearing as translucent dots), with strongly parallel venation; bark on medium-aged to mature trees papery and peeling; fruit a sub-globse capsule (the hypanthium somewhat woody)

          6 Leaves (when fresh) not strongly fragrant nor bearing glandular punctae, instead with stellate hair, rufous 2-branched hair, or punctate scale, leaf venation various but not strongly parallel, bark various but not papery.

             7 Plants exuding milky sap (when punctured); fruit a berry, these large, subglobose and roughened on the exterior (Manilkara) or smaller and ellipsoid to ovoid in shape (Chrysophyllum); plants (leaves or elsewhere) with rufous, 2-branched hair (strongly rufous in Chrysophyllum; if leaves strongly glaucous and glabrous, as in Manilkara jamiqui, then leaf apices clearly retuse)

               8 Sepal 4-6 (in one whorl, these all imbricate); fruit an ellipsoid to ovoid berry, purple to black when ripened, the outer surface not notably roughened; leaves (abaxially) densely rufous throughout

               8 Sepal 6 (in 2 whorl of 3, the outer whorl valvate); fruit subglobose and , the outer surface brown and roughened when ripe; leaves glabrous (glaucous and with a retuse apex) or if rufous the hair usually concentrated along the midrib

             7 Plants not with conspicuous milky sap; fruit a drupe (Elaeagnus) or acorn (Quercus); plants with peltate scale or stellate hair.

                 9 Vestiture of the lower leaf surface of silvery and/or reddish peltate scale; plants hermaphroditic, the flowers bisexual; fruit a fleshy drupe

                 9 Vestiture of the lower leaf surface in part of stellate hair (and also of simple acicular hair and gland-tipped hair); plants monoecious, the male flowers in yellow to brownish catkin, the female flowers solitary or in small spike; fruit a nut in a cupule (an acorn)

      4 Leaves glabrous, or if hairy, the hair strictly simple (sometimes also bearing a few conspicuous apical, marginal or abaxial pit domatia in COMBRETACEAE).

                   10 Flowers solitary, terminal, large (> 5 cm in diameter); pistil many, carpel separate; petal many (typically > 8); leaves mostly > 10 cm long (at least some on a branch longer than 10 cm); fruit an aggregate of follicle, each dehiscing along 1 suture; stipule scar circumferential at each node, encircling the twig

                   10 Flowers axillary or terminal, arranged variously in raceme, panicle, umbel, cyme, fascicle, or sometimes solitary (if so, < 5 cm in diameter); pistil 1, with 1-8 fused carpel; petal 3-8 (apetalous in Conocarpus); leaves < 30 cm long; fruit either a drupe, berry, or capsule; stipule scar either absent or linear or triangular, not circumferentially encircling the twig.

                     11 Inflorescence terminal, the flowers arranged in a corymb, umbel, compound cyme, or raceme (panicle in Pittosporum and sometimes Conocarpus); fruit either a capsule (dehiscing along 1 to 5 longitudinal suture, elongate in CAPPARACEAE) or a 1-4-seeded drupe (Bourreria; Canella; Lumnitzera).

                       12 Flowers apetalous, arranged in small spherical heads within a raceme or panicle; plants of salt-exposed coastal habitats

                       12 Flowers bearing petal; plants of various inland and coastal habitats

                          13 Plants sometimes with pneumatophores; leaf blade with apical and pit-domatia present; [non-native, s. FL]

                          13 Plants never with pneumatophores; leaf blade without pit-domatia.

                            14 Inflorescence a compound cyme; petal deep red to magenta; fruit a 1-few-seeded drupe

                            14 Inflorescence a simple corymb, umbel, or raceme (panicle in Pittosporum); petal white or pink; fruit a capsule, opening along 1, 3, or 5 suture (or a 4-seeded drupe in Bourreria).

                              15 Fruit a capsule (splitting along 1, 3, or 5 suture); flowers white or pink, rotate but not salverform (lacking an evident lengthened corolla tube), arranged in terminal (or sometimes axillary) corymb, umbel, or raceme (panicle in Pittosporum).

                                16 Capsule pendulous and conspicuously elongate-cylindric, borne on a slender gynophore; seeds few-many, contrasting sharply with the bright red capsule interior; plants shrubs or small trees, or sometimes loosely scrambling over other plants; stamen usually much longer than the petal and conspicuously exerted from the flowers

                                16 Capsule erect, not long-cylindric nor borne on a slender gynophore; capsule interior not bright red; plants shrubs or trees; stamen not conspicuously exerted past the petal.

                                  17 Ovaries 2-carpellate; capsule dehiscing along one major adaxial suture, appearing berry-like before dehiscence, the seeds often surrounded by a glutinous material

                                  17 Ovaries 5-10-carpellate; capsule dehiscing along 5 suture.

                                    18 Capsule ovoid to globose or subglobose, about as long as broad, 5-8 mm long; leaves 5-12 cm long, 2-3× as long as wide

                                    18 Capsule elongate, > 2× as long as broad, 8-18 mm long; leaves 10-30 cm long, 3-5× as long as wide

                     11 Inflorescence axillary, the flowers arranged in a raceme, panicle, umbel, fascicle, or sometimes flowers solitary; fruit drupaceous, fleshy to dry, but not regularly dehiscent along suture.

                                       19 Flowers apetalous, arranged in small spherical heads within a raceme or panicle; plants of salt-exposed coastal habitats

                                       19 Flowers bearing petal, the inflorescence variously shaped (flowers occasionally solitary); plants of various inland and coastal habitats.

                                         20 Flowers solitary, axillary or superaxillary; perianth somewhat fleshy, in whorl of 3; carpel numerous, partly fused; fruit an aggregate syncarp

                                         20 Flowers in inflorescence of > 2 flowers (or if rarely solitary, then the perianth 5-merous); perianth not fleshy, in whorl of 4 or 5 (or 3 in Lauraceae); carpel 1, 2, 3, 4, or 5, fused (at least basally); fruit a capsule, drupe, or berry

                                           21 Inflorescence an axillary spike or axillary raceme (with an elongate central axis, to which all flowers/fruits are attached).

                                             22 Flowers arranged in axillary spike; leaves clustered at branch tips; stipule reduced to glandular hair at petiole base; plants armed or unarmed; branches arranged in tiers, the main branches erect, the lateral spreading horizontally

                                             22 Flowers arranged in axillary raceme; leaves clustered apically or spaced; stipule absent or shedding and linear-lanceolate; plants unarmed; branches not arranged in conspicuous tiers.

                                               23 Fruit a dry, tan to brown, spherical or winged drupe; stamen 5 or 10; carpel 2-5; leaves entire only, oblanceolate (rarely narrowly elliptic), < 2.5 cm wide, the apex obtuse (more rarely acute, retuse, or rounded); stipule absent

                                               23 Fruit a fleshy, black, spherical drupe; stamen 10; carpel 1; leaves entire or spinose-serrate, elliptic, the apex acute to short-acuminate; stipule shedding, linear to lanceolate

                                           21 Inflorescence either an axillary umbel, cyme, or fascicle (or reduced to solitary) or an axillary compound inflorescence (panicle or compound cyme), with 2-3 orders of branching.

                                                 24 Fruit a fleshy and oily 1-seeded drupe; flowers 3-merous, with separate and undifferentiated perianth segment; fresh plants strongly aromatic; inflorescence compound, a panicle or compound cyme (with 2-3 orders of branching); [Basal Angiosperm]

                                                 24 Fruit a fleshy (but not oily) 1-8-seeded drupe, a berry, or a 2-4-locular capsule; flowers 4-8-merous, with differentiated sepal and petal, the petal usually basally fused; fresh plants not strongly aromatic; inflorescence an axillary umbel or fascicle (or reduced to solitary), a central axis absent or < 1 cm long; [Eudicot].

                                                    25 Leaves somewhat 2-ranked (subdistichous), the base of the blade usually oblique; flowers yellowish-green, occasionally present on the trunk (plants cauliflorous), the trunk often fluted (with irregular vertical ridges, at least on larger plants); [c. and s. FL only in our flora area]

                                                    25 Leaves usually not subdistichous, the base of the blade not oblique; flowers usually white (Ilex) or white, cream, greenish, or yellowish (Sideroxylon; Tricerma), these never present on trunk, the trunk rounded (not fluted); [collectively widespread, including FL]

                                                      26 Fruit a bright red, 2-4-locular capsule, the seeds surrounded by a bright red aril

                                                      26 Fruit a drupe or berry.

                                                        27 Plants unarmed (stems lacking armature, but the leaves bearing marginal prickle or spine); stamen 4-7, not epipetalous; fruit a drupe with 4-8 pyrene; flowers 4-7-merous

                                                        27 Plants armed with nodal thorn; stamen 5 and staminodia 5, epipetalous; fruit a berry or drupe with 1 seed;flowers 5-merous

1 Leaves deciduous.

                                                          28 Leaf base deeply to shallowly cordate, with 3-7 palmate veins from the base; leaf blade about as wide as long or a little longer, mostly 0.9-1.3× as long as wide.

                                                            29 Juncture of petiole and leaf blade with 2 red gland; corolla radially symmetrical, with 5-8 petal, white with red veins towards the base of the petal; flowers unisexual; fruit globose, 4-8 cm in diameter; main palmate leaf veins 3 (-5)

                                                            29 Juncture of petiole and leaf blade eglandular, but the uppermost 1-3 mm of the petiole swollen into a prominent upper pulvinus; corolla bilaterally symmetrical, with 5 petal, pink to purple (rarely white in some cultivar); flowers bisexual; fruit an oblong, flat legume, 6-10 cm long; main palmate leaf veins 5-7 (-9)

                                                          28 Leaf base cuneate, rounded, truncate, subcordate, or auriculate (with 2 small “earlobe-like” lobe at the base of the leaf blade), with 1 (mid) vein from the base (3 veins from the base in Celtis in CANNABACEAE); leaf blade about as wide as long, or somewhat to much longer, 0.9-10× as long as wide.

                                                              30 Leaves 0.9-1.4× as long as wide (some taxa keyed in both leads).

                                                                 31 Stipule scar circumferential, forming a line around the twig; flowers and aggregate fruit solitary, terminal; [Basal Angiosperm]

                                                                 31 Stipule scar not circumferential (or not apparent); flowers and simple fruits in inflorescence of 1-many flowers, axillary or terminal, but not simultaneously solitary and terminal; [Eudicot].

                                                                   32 Leaf blade 3-6 cm long, 1-1.5× as long as the flexuous petiole

                                                                   32 Leaf blade 4-30 cm long, > 3× as long as the stiff petiole.

                                                                     33 Petiole 1-5 (or more) cm long; leaves broadly orbicular, rounded at the base, usually rounded (rarely obtuse or nearly acute) at the apex, entire; hair on foliage simple or absent; fruit a fleshy drupe

                                                                     33 Petiole < 1 cm long; leaves various in shape, often acuminate at the apex and/or cuneate at the base, often with some tendency to toothing; hair on foliage stellate (use at least 10× magnification), at least in part; fruit either a nut borne in a cup (acorn) or a dry, subglobose 3-valved capsule, with 1 seed.

                                                                       34 Fruit a nut in a cupule (an acorn); flowers unisexual, greenish or brownish, individually inconspicuous, the male flowers borne in catkin

                                                                       34 Fruit a dry, subglobose 3-valved capsule, with 1 seed; flowers bisexual, white, conspicuous

                                                              30 Leaves > 1.4× as long as wide.

                                                                         35 Leaves densely covered with silvery peltate scale (use 10× or greater magnification), giving the leaf blade surface a metallic appearance

                                                                         35 Leaves glabrous, glabrescent or variously pubescent (including densely and silkily so, giving the leaf surface a shiny appearance), but not as above.

                                                                           36 Plants bearing nodal thorn; leaves elliptic to obovate, 3-9 cm long, 1-4 cm wide, 1.5-4× as long as wide.

                                                                              37 Sap clear, not viscous; sepal 4; petal 4, densely long-hairy on their upper (inner) side); fruit a yellow, 1-seeded drupe, 20-30 mm long; [FL southward]

                                                                              37 Sap milky or nearly clear but thick and sticky; sepal 5; petal 5, not densely long-hairy; fruit a black, 5-seeded berry, 5-15 mm long; [widespread in our area]

                                                                           36 Plants unarmed (except spiny in Maclura in MORACEAE); leaves various in shape, from broadest towards the base, near the middle, or towards the apex, 3-80 cm long, 1-30 cm wide, 1.5-10× as long as wide.

                                                                                38 Leaves distinctly widest near the base (at a point < 0.3× of the way from the base of the leaf blade to its apex), gradually long-tapering to an acuminate apex.

                                                                                  39 Fruit a spherical, dry drupe, 4-8 mm in diameter, with a single seed; leaf 1.5-6 cm wide

                                                                                  39 Fruit a spherical, fleshy multiple, 80-120 mm in diameter; leaf 5-8 cm wide

                                                                                38 Leaves widest near the middle or towards the tip of the leaf blade (at a point > 0.4× of the way from the base of the leaf blade to its apex).

                                                                                    40 Pubescence of the foliage stellate (at least in part; simple hair sometimes present as well); flowers unisexual, the individual flowers inconspicuous, male flowers in catkin; fruit a nut in a cupule (an acorn)

                                                                                    40 Pubescence of the foliage simple or absent (except stellate in STYRACACEAE); flowers bisexual, conspicuous, borne variously, but not in catkin (except in Leitneria); fruit various.

                                                                                      41 Leaf undersurface strongly whitened

                                                                                      41 Leaf surface green (often somewhat paler green than the upper surface, but not whitened).

                                                                                        42 Flowers unisexual and borne in male and female catkin; plants dioecious

                                                                                        42 Flowers bisexual, not borne in catkin; plants hermaphroditic.

                                                                                           43 Flowers solitary; ovary superior; perianth either 3-merous and whorled or many-merous and spiraled; leaves mostly > 20 cm long and > 8 cm wide, distinctly broadest towards the apex (> 0.6× of the way from the leaf blade base to apex) (except Magnolia acuminata, which is sometimes both shorter, narrower, and broadest near the middle or towards the base); [Basal Angiosperm].

                                                                                             44 Flowers axillary, < 2 cm across, brown or maroon; perianth 3-merous, whorled; fresh foliage with a strong musky odor; fruit a fleshy berry; leaves cuneate at the base; twig lacking circumferential stipule scar at each node

                                                                                             44 Flowers terminal, > 4 cm across, white, pale yellow, or pink; perianth many-merous, spiraled; fresh foliage not noticeably aromatic; fruit an aggregate of follicle; leaves cuneate or auriculate at the base; twig with circumferential stipule scar at each node

                                                                                           43 Flowers in inflorescence of several to many; ovary inferior (or superior in Diospyros in EBENACEAE and Cyrilla in CYRILLACEAE); perianth 4-5-merous; leaves mostly < 20 cm long and < 10 cm wide, broadest near the middle or towards the apex; [Eudicot].

                                                                                               45 Leaves with prominently parallel-arcing secondary vein; inflorescence a terminal corymb; leaves clustered at the tips of the twig, thus appearing pseudo-whorled; trichome of the leaf undersurface predominantly 2-branched (some simple) (use at least 10× magnification); flowers 4-merous; fruit a blue drupe; small tree

                                                                                               45 Leaves with secondary vein more obscure and complexly branching into tertiary veins; inflorescence axillary (often on the previous year’s wood), solitary to variously fascicled, clustered, or in raceme; leaves arrayed distichously along horizontal or arching twig, not prominently clustered or pseudo-whorled (except often in Cyrilla in CYRILLACEAE, Symplocos in SYMPLOCACEAE, and Nyssa in NYSSACEAE); trichome of the leaf undersurface either simple or stellate (or absent); flowers 4-5-merous; fruit a green, blue, or black drupe, an orange berry, or a green to brownish indehiscent capsule; small to large tree.

                                                                                                 46 Pubescence of foliage and other parts stellate (use at least 10× magnification); petal 4-5, white, 10-25 mm long; fruit dryish, indehiscent, either longitudinally 2-4-winged or not winged

                                                                                                 46 Pubescence of foliage and other parts simple; petal either 0, or 4-5 and pink, white, or greenish-yellow, or 10 and greenish-yellow; fruit either a somewhat to very fleshy drupe or berry or a dry, brownish, spherical drupe, 2-2.5 mm in diameter.

                                                                                                   47 Leaves < 2.5 cm wide, dark green above, somewhat thickened, and tardily deciduous or semi-evergreen; fruit a dry, brownish, spherical drupe, 2-2.5 mm in diameter; inflorescence a narrowly cylindrical raceme with > 40 flowers

                                                                                                   47 Leaves > 2.5 cm wide, usually medium-green above, herbaceous in texture, promptly seasonally deciduous; fruit a somewhat to very fleshy drupe or berry, > 5 mm in diameter; inflorescence a solitary flower or cluster, head, or irregular raceme of < 15 flowers.

                                                                                                     48 Fruit a drupe (green when ripe), cylindrical to barrel-shaped, 8-12 mm long; leaves rather thick and leathery in texture, persistent into the winter, dropping tardily or at latest the following spring; flowers bisexual; stamen 30-50, in 5 fascicle

                                                                                                     48 Fruit a berry (orange when ripe) or a drupe (blue-black, yellow, orange, or red when ripe), 8-50 mm long, spherical or ovoid to ellipsoid; leaves thin in texture, promptly deciduous in the autumn; flowers functionally unisexual; stamen 5-16, separate.

                                                                                                        49 Fruit a spherical berry, 15-50 mm long, orange when ripe, subtended by the enlarged and persistent woody or leathery calyx; vascular bundle 1 per leaf scar; leaves never toothed; leaves whitish-green beneath; leaf midrib and upper petiole with tiny gland on their upper surfaces (reddish initially, then darkening) (use at least 10× magnification); leaves glabrate to tomentose with curly hair beneath; female and male flowers on separate trees (dioecious); stamen 16; widest point of the leaf usually at the middle or below, the apex acute to acuminate

                                                                                                        49 Fruit an ovoid or ellipsoid drupe, 8-30 -40 mm long, blue-black, yellow, orange, or red when ripe; vascular bundle 3 per leaf scar; leaves sometimes bearing a few irregular teeth; leaves pale to medium green beneath; leaf midrib and upper petiole lacking reddish to dark gland on their upper surfaces; leaves glabrous or glabrate beneath; female and male flowers on the same tree (monoecious); stamen 5-12; widest point of the leaf usually beyond or at the middle, the apex obtuse to strikingly and abruptly acuminate