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1 Leaves 2-foliolate or 1-foliolate (and then deeply notched). |
2 Leaves 1-foliolate (2- lobed) |
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1 Leaves 3-, 5-, to many-foliolate. |
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4 Plant a liana, climbing by twining, by tendrils, or by adventitious roots. |
5 Leaves untoothed and unlobed |
5 Leaves coarsely toothed or lobed. {add Eleutherococcus trifoliatus ARALIACEAE} |
6 Leaflets obovate or broadly elliptic (broadest at or above the middle), the teeth or lobes primarily or solely in the apical half of the leaf; plant climbing by leaf-opposed tendrils |
6 Leaflets orbicular or ovate (broadest at the middle or below the middle), the teeth or lobes primarily or solely in the basal half of the leaf; plant climbing by stem twining or by dense, reddish adventitious roots. |
7 Plant climbing by the stem twining; [plant not actually woody, but so robust as to often be assumed to be so] |
7 Plant climbing by dense, reddish adventitious roots attaching the stem to tree trunks or rock outcrops |
4 Plant a shrub (sometimes scrambling or occasionally high- climbing with the support of other vegetation, but lacking the specialized climbing structures listed above). |
8 Stems armed with small prickles or stout thorns. |
9 Stems with stout thorns at the nodes; fruit a hesperidium (orange-like, but densely hairy) |
9 Stems with many small prickles along the internodes; fruit either a legume, or an aggregate of drupelets, or a hip. |
10 Leaflets with 2 rounded lateral lobes near the base, otherwise entire; fruit a legume |
10 Leaflets serrate and sometimes also cleft; fruit either an aggregate of drupelets or a hip |
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11 Leaflets serrulate, crenulate, serrate, with a few coarse and jagged teeth ( spine-tipped or not), or shallowly lobed. |
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12 Leaflets serrate, with a few coarse and jagged teeth ( spine-tipped or not), or shallowly lobed. |
13 Leaflets with 2 prominent, rounded lobes near the base; fruit a legume; flowers > 3 cm long, corollas bilaterally symmetrical, red, in a terminal raceme |
13 Leaflets serrate and sometimes also cleft, or with a few coarse and jagged teeth ( spine-tipped or not); fruit either a tan or red drupe or a red berry; flowers < 1 cm across, corollas radially symmetrical, green, yellow, or white, in axillary or terminal panicles or racemes |
14 Leaflets with a few spine-tipped teeth; fruit a red berry; [TX westwards] |
14 Leaflets not spine-tipped; fruit a red or tan drupe; [collectively widespread] |
11 Leaflets entire and unlobed. |
15 Terminal leaflet sessile. |
16 Leaflets < 2 cm long; stems and branches dark green |
16 Leaflets 5-15 cm long; stems and branches tan to brown |
15 Terminal leaflet with a petiolule. |
17 Leaves pinnately trifoliolate, a rachis present as an extension of the petiole past the point of attachment of the 2 lateral leaflets, the terminal leaflet borne on a petiolule at the terminus of the rachis, with an obvious joint present between the rachis and petiolule |
17 Leaves palmately trifoliolate, the terminal leaflet typically with a longer petiolule than the lateral leaflets, but lacking a rachis (the petiolule of the terminal leaflet attached at the same point as the 2 lateral leaflets and unjointed) |
3 Leaves with 5-many leaflets (poorly developed leaves in some species with only 3 leaflets). |
18 Leaves palmately or palmately-pedately compound. |
19 Leaves palmately-pedately 5-foliolate (the lateral 2 leaflets on each side borne on a common Y-shaped stalk). |
20 Leaflets entire; sap milky |
20 Leaflets toothed; sap clear |
19 Leaves palmately compound (all the leaflets attached at a single point). |
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22 Leaflets with entire margins |
22 Leaflets with serrate margins. |
23 Stems armed with prickles scattered in the internodes |
23 Stems unarmed or with paired nodal spines. |
24 Inflorescence an umbel; leaves evergreen, glossy; stems often with paired nodal spines |
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18 Leaves pinnately, bipinnately, or complexly compound. |
25 Leaves at least in part pinnate- pinnatifid, 2- pinnate, or otherwise more complexly compound than 1- pinnate. |
26 Leaves evenly 2- pinnately compound |
26 Leaves oddly pinnate- pinnatifid, 2- pinnately compound, or more complexly compound than 2- pinnate. |
27 Leaves pinnate- pinnatifid, with 7-19 leaflets, each leaflet pinnatifid into narrowly lanceolate lobes; {upper leaflet surface dark green, lower surface silvery with gray sericeous pubescence} |
27 Leaves 2- pinnately compound, or even more complexly compound. |
28 Plant a liana, climbing by tendrils |
28 Plant a shrub or tree, not climbing. |
29 Plant armed with prickles on the stem, and sometimes also on the axes and main veins of the leaves |
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30 Plant a shrub, < 2.5 m tall. |
31 Foliage green; leaflets ovate, acute at the tip; flowers 3 -merous, the tepals white or cream; fruit a red berry |
31 Foliage blue-green; leaflets obovate, rounded or notched at the tip; flowers 4-5 -merous, the sepals green, the petals yellow; fruit a capsule |
30 Plant a tree, > 3 m tall when flowering and fruiting. |
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33 Fruit a globose drupe, tan at maturity, 10-15 mm in diameter; inflorescence an axillary panicle; corolla lavender |
33 Fruit an inflated capsule, 30-50 mm long; inflorescence a terminal thyrse; corolla yellow |
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34 Leaves even- pinnately compound (generally with 2 leaflets at the apex of the rachis, these obviously and symmetrically paired). |
35 Leaflets rounded to obtuse at the apex (or acute to acuminate in Gymnocladus); fruit a legume; inflorescence various, but not as below |
35 Leaflets acuminate at the apex; fruit a drupe or capsule; inflorescence a panicle with many, small, radially symmetrical flowers. |
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37 Tree dioecious; drupe ca. 5 mm long; stamens (of male flowers) 3-5 (-7) |
37 Tree bisexual; drupe ca. 13 mm long; stamens 8-10 |
34 Leaves odd- pinnately compound (generally with a single leaflet at the terminus of the rachis). |
38 Leaves very large, > 10 dm long |
38 Leaves small to large, < 10 dm long. |
39 Stems armed with prickles or stipular or nodal spines; leaves often also with prickles. |
40 Leaves with conspicuous leafy stipules, often adnate to the petiole; plant a liana or small to medium shrub; leaves serrate, often sharply and prominently so; leaves not strongly aromatic when fresh, lacking pellucid punctate glands on the surface |
40 Leaves lacking leafy stipules; plant a tree or tall shrub; leaves entire or obscurely crenate or serrate; plant a tree or tall shrub; leaves either strongly aromatic when fresh, with conspicuous pellucid punctate glands or not aromatic and not pellucid- punctate. |
41 Leaves not aromatic when fresh, lacking pellucid punctate glands; leaves never with prickles on the rachis; leaflet apices rounded |
41 Leaves strongly aromatic when fresh, with conspicuous pellucid punctate glands; leaves often with prickles on the rachis; leaflet apices usually acuminate |
39 Stems unarmed (leaflets with spinose margins in some species, or the stem with dense hispid hairs). |
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43 Plant an upright shrub or tree, not climbing. |
44 Plant a medium or tall tree. |
45 Leaves with stipules; flowers bilaterally symmetrical, papilionaceous, white, cream, or pink; stamens 10; fruit a legume; [collectively widespread in our area] |
45 Leaves without stipules; flowers radially symmetrical, whitish; stamens 5 or 10; fruit a single-seeded drupe; [FL peninsula] |
44 Plant a shrub or small tree to 7 (-10) m tall. |
46 Leaf 2-5 cm long, with 5-7 leaflets |
46 Leaf > 8 cm long, with 5-many leaflets. |
47 Flowers bilaterally symmetrical, papilionaceous (reduced in Amorpha to a single petal); stamens 10; fruit a legume; leaves with stipules. |
47 Flowers radially symmetrical, stamens 4-5; fruit either a drupe (Anacardiaceae), or a 1-3-seeded berry or a samara (Picramniaceae); leaves without stipules. |
48 Inflorescence a panicle; fruit a drupe; [collectively widespread] |
48 Inflorescence a raceme or compound thyrse; fruit a samara or 1-3-seeded berry; [s. FL] |
42 Leaflets serrate or crenate. |
49 Leaflets crenate, the teeth rounded and often inconspicuous. |
50 Leaflets with obscure crenations, not as below nor bearing glands; leaf rachis narrowly to conspicuously winged, especially towards the tip; fruit a drupe; plant a shrub or small tree |
50 Leaflets (especially the basal and on the basalscopic side) with 1-5 large rounded teeth, each bearing a prominent dark green gland; leaf rachis not winged; fruit a schizocarp, with 2-5 samaroid mericarps; plant a medium to large tree |
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51 Leaf serrations spinose |
51 Leaf serrations not spinose. |
52 Inflorescences axillary. |
53 Plant a tree, freely branched; rhizome inner bark not brightly colored; flowers unisexual, the male flowers in catkins, the female flowers solitary or few in a spike, the perianth greenish or tan and inconspicuous; fruit a nut covered by a dehiscent or indehiscent involucre |
53 Plant a short shrub, < 1 m tall, little branched; rhizome inner bark of fresh plants bright yellow; flowers bisexual, petals absent, the 5 petaloid sepals maroon; inflorescence a drooping panicle from the base of the new year’s growth; fruit an aggregate of follicles |
52 Inflorescences terminal. |
54 Inflorescence corymbose (flat-topped or rounded, as wide as long or wider); fruit a red pome |
54 Inflorescence paniculate (longer than wide); fruit various (see below), but not as above. |
55 Leaves stipulate; flowers bright white; fruit an aggregate of 5 follicles |
55 Leaves lacking stipules; flowers cream or yellow; fruit either a drupe or an inflated membranaceous capsule. |
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56 Fruit an inflated membranaceous capsule |
1 Stamens numerous; inflorescences of many flowers arranged in a closely packed sphere or cylinder; leaves replaced by phyllodes, these leathery in texture and often crescent-shaped; [Mimosoid clade] |
1 Stamens 10 (or fewer); inflorescences various, the flowers larger and more diffuse; leaves 1-, 2-, or 3-foliolate, or reduced to phyllodial spines; [subfamily Faboideae or Cercidioideae] |
2 Leaves 1- or 2-foliolate and > 2 cm wide; trees, shrubs, or lianas. |
3 Seeds 1-2 (-4) per fruit; corolla pale yellow, pale pink, or white; longest petals 7-10 mm long; [subfamily Faboideae] |
3 Seeds > 5 per fruit; corolla purplish-pink, bright pink, or white; longest petals 10-100 mm long [subfamily Cercidioideae] |
4 Leaves with a rounded to apiculate apex; flowers strongly bilaterally symmetrical, “pseudopapilionoid”; petals 0.8-1.5 cm long; legumes 4-10 cm long; [natives and exotics, and widely cultivated] |
4 Leaves either unifoliolate with a deeply notched apex or 2-foliolate; flowers slightly bilaterally symmetrical; petals 1.5-8 (-10) cm long; legumes 7-30 cm long; [exotics, of FL peninsula]. |
5 Shrub or tree; petals 3-8 (-10) cm long |
5 Liana ( climbing by twining and by tendrils); petals 1.5-2.0 cm long |
2 Leaves 3-foliolate, or reduced to phyllodial spines, or 1-foliolate (but then < 2 cm wide); shrubs or woody vines (rarely trees in Erythrina); [subfamily Faboideae]. |
6 Woody vine ( Pueraria, a robust herbaceous vine, is also keyed here as a failsafe). |
7 Leaves glandular beneath; terminal leaflets 1.3-4 cm long |
7 Leaves eglandular beneath; terminal leaflets 5-20 cm long. |
8 Terminal leaflet 1.5-2.5× as long as wide; corolla yellow; legume 4-6 cm wide; seeds 2-3 cm wide |
8 Terminal leaflet 0.8-1.3× as long as wide; legume 0.8-1.3 cm wide; seeds < 1 cm wide; corolla purplish or red. |
9 Calyx 4.5-6 mm long; leaflets unlobed; [tribe Phaseoleae] |
9 Calyx 10-12 mm long; leaflets generally lobed; [tribe Phaseoleae] |
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10 Shrub with angled or flanged green twigs; leaves palmately trifoliolate, unifoliolate, or reduced to spine-tipped phyllodes; [introduced]; [tribe Genisteae]. |
11 Flowers red-purple; calyx 2-3 mm long; [tribe Galegeae] |
11 Flowers bright yellow; calyx 3-15 mm long; [tribe Genisteae] |
12 Leaves all reduced to phyllodial spines; flowers axillary; calyx 10-15 mm long |
12 Leaves with normal lamina, either 1-foliolate or 3-foliolate; flowers in terminal racemes; calyx 3-6 mm long. |
13 Leaves 3-foliolate lower on the stem, often 1-foliolate above; corolla 15-22 mm long |
13 Leaves 1-foliolate throughout; corolla either 10-14 mm or 20-25 mm long |
14 Corolla 10-14 mm long; fruits 1.5-3 cm long |
14 Corolla 20-25 mm long; fruits 5-10 cm long |
10 Shrub or tree with twigs various, but not conspicuously green or flanged; leaves pinnately trifoliolate or unifoliolate. |
15 Leaflet margins toothed; [rare waif]; [tribe Trifolieae] |
15 Leaflet margins entire; [collectively common and widespread]. |
16 Leaves unifoliolate; [tribe Genisteae] |
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17 Corolla 15-50 mm long, yellow or scarlet; legume with several seeds; leaflets lobed or not; [tribe Phaseoleae] |
18 Corolla 15-21 mm long, yellow; leaflets unlobed; leaflets densely yellow glandular- punctate |
18 Corolla 30-50 mm long, scarlet; leaflets lobed or not; leaflets eglandular |
17 Corolla 8-15 mm long, purplish, pink, or white; legume 1-seeded; leaflets not lobed. |
19 Foliage glandular- punctate; [tribe Psoraleae] |
19 Foliage eglandular; [tribe Desmodieae] |
1 Leaflets denticulate (sometimes inconspicuously so); [tribe Trifolieae]. |
2 Inflorescences elongate racemes with an axis 5-15 cm long, the flowers well-spaced along the axis, the overall inflorescence much longer than its diameter |
2 Inflorescences umbellate or headlike clusters or short racemes with an axis < 2 cm long, the flowers closely clustered, the overall inflorescence little (if at all) longer than its diameter. |
3 Legumes spirally coiled or curved, often tuberculate or prickly; stems 4-angled towards the tip |
3 Legumes straight or nearly so, never tuberculate or prickly; stems terete or flattened (2-angled) towards the tip |
1 Leaflets entire (and sometimes also with 1 or 2 broad lobes), or with scattered, irregular large teeth ( Pachyrhizus erosus). |
4 Main stems erect or ascending, not trailing, twining, or otherwise vine-like. |
5 Flowers not papilionaceous (the wings and keel epistemonous, arising terminally or laterally from the stamen tube), barely bilaterally symmetrical; stamens 5, monadelphous; [tribe Amorpheae] |
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6 Plants with separate leafy and flowering stems (the flowering stems naked or nearly so of leaves). |
7 Standard bright red, remaining folded, 30-50 mm long; leaves hastately lobed; fruit a torulose legume, 6-20 cm long, the seeds red; [tribe Phaseoleae] |
7 Standard white or pink, expanded, 4-8 mm long; leaves not hastate; fruit a flattened loment, < 5 cm long, the seeds drab; [tribe Desmodieae] |
6 Plants bearing leaves and flowers on the same stems. |
8 Leaves, stems, and/or calyces glandular- punctate. |
9 Corollas pink or lavender/purplish; leaflets estipellate; fruit 1-seeded, indehiscent; [tribe Psoraleae] |
9 Corollas yellow; leaflets stipellate; fruit 2-many-seeded, dehiscent; [tribe Phaseoleae, subtribe Cajaninae] |
8 Leaves, stems, and calyces lacking punctate glands. |
10 Leaflet blades large, at least the largest terminal leaflets on a plant > 5 cm long. |
11 Stipels absent on the petiolules of mature leaflets; stamens monadelphous. |
12 Fruit a legume (not segmented into 1-seed dispersal units), hairy but the hairs not hooked; [plants cultivated as garden plants, rare as waifs] |
12 Fruit a loment (separating into single-seeded segments), uncinulate (with hooked hairs, the fruits attaching to hairs or clothes as 'stick-tights'); [plants widespread, common] |
11 Stipels present, persistent; stamens diadelphous (9 and 1). |
13 Fruit a loment (separating into single-seeded segments), uncinulate (with hooked hairs, the fruits attaching to hairs or clothes as 'stick-tights'); [plants widespread, common] |
13 Fruit a legume (not segmented into 1-seed dispersal units), hairy but the hairs not hooked; [plants cultivated as crops or garden plants, rare as waifs] |
14 sKeel of corolla not coiled; stipules inconspicuous; [soy beans] |
14 Keel of corolla coiled 1-3 turns; stipules conspicuous, persistent, striate; [bush green beans or lima beans] |
10 Leaflet blades smaller, all on a plant < 5 cm long. |
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16 Fruit a loment (separating into single-seeded segments), uncinulate (with hooked hairs, the fruits attaching to hairs or clothes as 'stick-tights') |
16 Fruit a several- to many-seeded legume, glabrous to hairy (but not uncinulate) |
15 Stipels absent on the petiolules of mature leaflets. |
17 Fruits dehiscent, a legume with 2 or more seeds. |
18 Terminal leaflet very similar in size as the 2 lateral leaflets; banner petal prominently striate-veined |
18 Terminal leaflet 2× or more as long as the 2 lateral leaflets; banner petal evenly colored |
17 Fruits indehiscent: either 1-seeded, or a loment with 2 or more one-seeded ( indehiscent) segments. |
19 Petioles fused most of length with amplexicaul stipules, the leaves thus appearing sessile or nearly so; corollas lemon to orangy yellow; flowers subsessile; fruit a loment of 2 segments, the terminal segment fertile, the lower segment either sterile or fertile |
19 Petioles free from stipules, leaves evidently petiolate; corollas white to pink; flowers pedicellate; fruit either 1-seeded, or a loment normally with 3+ segments |
20 Fruit a loment, with 1-3 segments; terminal leaflets 3-10 cm long, 1-1.5× as long as wide; stamens monadelphous |
20 Fruit 1-seeded; terminal leaflets 1-5 cm long, 1.2-8× as long as wide; stamens diadelphous (9 and 1) |
4 Main stems trailing, twining, creeping, or climbing or sprawling over other vegetation. |
21 Leaves, stems, and/or calyces glandular- punctate; corollas yellow. |
21 Leaves, stems, and calyces lacking punctate glands; corollas yellow, pink, purplish, white, red, blue. |
22 Leaflet blades smaller, all on a plant < 5 cm long. |
23 Stipels absent on the petiolules of mature leaflets. |
24 Fruit a loment of 2 segments, the terminal segment fertile, the lower segment either sterile or fertile; corollas lemon to orangy yellow |
24 Fruit 1-seeded; corollas pink-purplish to white, or bronze to brick-red. |
25 Corollas pink-purplish to white |
25 Corollas bronze to brick-red |
23 Stipels present, persistent (minute in Amphicarpaea). |
26 Fruit a loment (separating into single-seeded segments), uncinulate (with hooked hairs, the fruits attaching to hairs or clothes as 'stick-tights'). |
27 Flowers in axillary or terminal racemes; leaflets rotund, broadly ovate, broadly elliptic, or narrowly elliptic, the larger > 1 cm long. |
27 Flowers in axillary clusters; leaflets broadly obovate, 0.5-1 cm long |
26 Fruit a legume, dehiscent (at least tardily), unsegmented, and with 2+ seeds. |
28 Flowers resupinate (the pedicel twisted 180 degrees), the banner 2.5-5.5 cm long and positioned lowermost. |
29 Calyx lobes equal to or longer than the calyx tube; fruits 3-5 mm wide |
29 Calyx lobes shorter than the calyx tube; fruits 5-8 mm wide |
28 Flowers not resupinate, the banner 0.7-2.5 cm long and positioned uppermost. |
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30 Stipules persistent, sometimes conspicuous, sometimes striate. |
31 Keel petal and the included style straight to gently upcurved; stems very slender, < 0.75 mm in diameter |
31 Keel petal and the included style either strongly curved upwards 90-180 degrees, or even more extensively coiled (asymmetrically and spirally) in towards the flower center; stems slender to thicker, > 0.75 mm in diameter. |
32 Keel petal and the included style strongly curved upwards 90-180 degrees; corollas yellow or pink to lavender (or whitish). |
33 Corollas pink to lavender (or whitish); corolla keel usually somewhat twisted, asymmetrical; [widespread in our region] |
33 Corollas yellow; corolla keel symmetrical; [mainly outer Coastal Plain] |
32 Keel petal and the included style extensively coiled > 180 degrees (asymmetrically and spirally) in towards the flower center; corollas pink, purple, maroon, purple-black (or whitish). |
34 Peduncles long, the flowers borne in clusters on a raceme axis shorter than the peduncle; plants glabrate to villous, the hairs not hooked |
34 Peduncles short, the flowers scattered along a (sometimes branched) raceme axis, the raceme axis about as long as or longer than the peduncle; plants uncinulate pubescent (use 20× magnification, or touch the plant for the 'tacky' feel) |
22 Leaflet blades large, at least the largest terminal leaflets on a plant > 5 cm long. |
35 Stipels absent on the petiolules of mature leaflets; stamens monadelphous |
35 Stipels present, persistent (minute in Amphicarpaea); stamens diadelphous (9 and 1) or monadelphous ( Pueraria). |
36 Stamens monadelphous; robust herbaceous vine with stems to 30 m long; flowers purple, when fresh smelling like artificial grape flavoring. |
36 Stamens diadelphous (9 and 1); herbaceous vines with stems usually < 5 m long; flowers various in color, not 'grapy' in odor. |
37 Flowers resupinate (the pedicel twisted 180 degrees), the banner ( standard) petal lowermost; banner ( standard) 25-50 mm long, much larger than the other petals. |
38 Calyx lobes equal to or longer than the calyx tube; fruits 3-5 mm wide |
38 Calyx lobes shorter than the calyx tube; fruits 5-8 mm wide |
37 Flowers not resupinate, the banner ( standard) uppermost; banner ( standard) < 25 mm long, or if up to 30 mm then not much longer than the other petals. |
39 Fruit a loment (separating into single-seeded segments), uncinulate (with hooked hairs, the fruits attaching to hairs or clothes as 'stick-tights') |
39 Fruit a several- to many-seeded legume, glabrous to hairy (but not uncinulate). |
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41 Stipules inconspicuous or obsolescent. |
42 Leaflets coarsely toothed; roots tuberous |
42 Leaflets with entire margins (sometimes with 1-2 rounded lobes); roots slender |
43 Corolla 3-4 cm long; fruits constricted between the seeds; fruits with stinging hairs |
43 Corolla < 2 cm long; fruits constricted or not; fruits glabrous or hairy, the hairs not stinging. |
44 Bracteoles below the calyx persistent; ventral suture of the fruit bumpy- nodose; style bearded |
44 Bracteoles caducous; ventral suture of the fruit not bumpy- nodose; style glabrous. |
45 Leaflets (2-) 4-8 cm long, 0.8-1.5 cm wide, 5-6× as long as wide; leaflet apices acute to obtuse; fruits not flanged or winged |
45 Leaflets 6-14 cm long, 4-10 cm wide, 1-1.3× as long as wide; leaflet apices strongly acuminate; fruits with a flange or wing along the ventral suture |
41 Stipules persistent and conspicuous. |
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47 Flowers clustered 3 or more at the inflorescence nodes; upper calyx lobes fused. |
47 Flowers arrayed differently; upper calyx lobes separate. |
48 Keel petal and the included style straight to gently upcurved; stems very slender, < 0.75 mm in diameter |
48 Keel petal and the included style strongly curved upwards 90-180 degrees; stems slender to thicker, > 0.75 mm in diameter |
40 Keel petal and the included style either strongly curved upwards 90-180 degrees, or even more extensively coiled (asymmetrically and spirally) in towards the flower center; style or stigma pubescent. |
49 Plants uncinulate pubescent (use 20× magnification, or touch the plant for the 'tacky' feel) |
49 Plants glabrate to villous, the hairs not hooked. |
50 Keel petal and the included style strongly curved upwards 90-180 degrees |
51 Corolla keel symmetrical; [mainly outer Coastal Plain] |
51 Corolla keel usually somewhat twisted, asymmetrical; [widespread in our region] |
50 Keel petal and the included style even more extensively coiled (asymmetrically and spirally) in towards the flower center. |
52 Corolla 2.5-4 cm long, the wings about as long as the other petals; leaflets not lobed |
52 Corolla 1.5-2 cm long, the wing petals longer than the other petals; leaflets lobed |