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No key was found for the requested taxon, but it has only one child: Lycianthes asarifolia. Showing where it is keyed below.

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Keyed in multiple places:

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Key to Solanaceae

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1 Leaves all basal, from creeping rhizomes; corolla white; [subfamily Solanoideae].
  2 Leaves broadly elliptical, rounded at the base; corolla lobes > 2× as long as wide, attenuate at the tip; [tribe Jaboroseae]
  2 Leaves ovate, strongly cordate at the base; corolla lobes < 1.5× as long as broad, obtuse (acute) at the tip; [tribe Capsiceae]
1 Leaves all or mainly cauline.
    3 Plant distinctly woody, an upright shrub or scrambling vine.
      4 Flowers white or yellow, the tube > 6× as long as its diameter; fruit either a white berry, or a capsule.
        5 Fruit a white berry; [subfamily Cestroideae; tribe Cestreae]
        5 Fruit a capsule; [subfamily Nicotianoideae]
      4 Flowers lavender or blue, the tube < 3× as long as its diameter; fruit a red, orange, or yellow berry; [subfamily Solanoideae].
          6 Leaves 0.5-7 cm long, 0.2-3.5 cm wide; [tribe Lycieae]
          6 Leaves 10-30 cm long, 4-14 cm wide; [tribe Solaneae]
    3 Plant herbaceous (some taxa keyed here can be robust and tough-stemmed, but are herbaceous, lacking overwintering buds on aerial stems).
             7 Corolla salverform or narrowly funnel-shaped, with a well-developed tubular portion, this > 1 cm long (except in Calibrachoa) and either flared or essentially isodiametric and > 4× as long as its midpoint diameter, the limb expanding more or less abruptly from the tubular portion; fruit a capsule opening by longitudinal valves or by apical pores.
               8 Corolla 7-25 cm long, white, pale blue or pale pink; capsule spiny, 3-5 cm long, subtended by a collar formed by the reflexed corolla base; [subfamily Solanoideae; tribe Datureae]
               8 Corolla 0.6-7 cm long, white, blue, pink, or other colors; capsule smooth, not collared.
                 9 Flowers solitary, axillary; [subfamily Petunioideae].
                 9 Flowers in (2-) 3-many flowered racemes or panicles.
                     11 Calyx accrescent in fruit, wholly or partly surrounding the capsule; corolla lavender to blue, with a whitish center; flower bilaterally symmetrical; stamens 4; [subfamily Cestroideae; tribe Browallieae]
                     11 Calyx not accrescent, subtending the mature fruit; corolla white, pink, green, pink, or blue; flower radially symmetrical; stamens 5.
                       12 Leaves broad, > 4 cm wide; corolla tube 1.5-12.0 cm long; [subfamily Nicotianoideae]
                       12 Leaves narrow, linear to narrowly oblancolate, to 0.5 mm wide; corolla tube 1.0-1.4 cm long; [subfamily Petunioideae]
             7 Corolla either urceolate, campanulate, or rotate, lacking a narrow tubular portion that is both > 1 cm long and > 4× as long as its midpoint diameter; fruit a berry (or circumscissile capsule in Hyoscyamus); [subfamily Solanoideae].
                          13 Fruit a circumscissile capsule; calyx accrescent, nearly enclosing the fruit; corolla cream to yellow, with a maroon center; inflorescence a strongly secund raceme; [tribe Hyoscyameae]
                          13 Fruit a berry (hollow in Capsicum); calyx either accrescent around the fruit or not (and then subtending the fruit); corolla various (but not as above, though in some Physalis yellow and with each petal marked with a purple or maroon spot); inflorescence various.
                              15 Berries 1.0-2.5 cm long; corolla urceolate (at least slightly constricted at the ‘neck’, just below the lobes of the corolla).
                                16 Berries nearly spherical, blue-black, 1.0-2.0 cm long, 1.0-2.0 cm in diameter; corolla 2-3 cm long, maroon or purple, and greenish towards the base; plant an upright herb; [tribe Hyoscyameae]
                                16 Berries elliptical, yellow, 1.5-2.5 cm long, 0.8-1.5 cm in diameter; corolla white 0.7-1.0 cm long, white; plant a trailing or scrambling vine; [tribe Physaleae]
                                  17 Locules air-filled; berries usually elongate and irregularly shaped (sometimes ovoidal or spherical; [peppers, chilies]; [tribe Capsiceae]
                                  17 Locules fleshy; berries spherical or ellipsoidal; [nightshades, tomato, potato, eggplant]; [tribe Solaneae]
                                       19 Calyx fused nearly to its summit; corolla white or yellow; [tribe Physalinae].
                                         20 Fruiting calyx bright red (fresh or dry); corolla white; [cultivated and weakly naturalized near gardens]
                                         20 Fruiting calyx green, yellow, or orange, drying brown or tan; corolla yellow, often marked with 5 large maroon or purple spots in the throat; [collectively widespread].
                                           21 Flowers 2 or more per leaf axil; berries with spherical seed-like bodies intermixed with the flattened, reniform seeds; [of the Gulf Coastal Plain]
                                           21 Flowers 1 per leaf axil; berries with flattened, reniform seeds only; [collectively widespread]

Key N2: herbaceous dicots with mainly basal, simple leaves

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1 Inflorescence an involucrate head subtended by phyllaries, the heads solitary or many and variously arrayed in secondary inflorescences, the ovary inferior, the corolla connate and tubular at least basally, the calyx absent, the stamens 5, the fruit a cypsela
1 Inflorescence, flower, and fruit structure various, but not with the combination of features as above (sometimes the flowers in a head subtended by bracts, e.g. Eryngium in APIACEAE, but then with other features differing, such as stamens 4, or green calyx present, or petals separate, or fruit a schizocarp of mericarps, etc.).
  2 Basal leaves 2-lobed, pinnately lobed, or palmately lobed (not considering cordate, hastate, or auriculate leaf bases as “lobed”).
    3 Basal leaves 2-lobed, hinged between the lobes, each lobe with stiff, marginal, eyelash-like bristles; [Coastal Plain of NC and SC, rarely planted and weakly naturalized elsewhere]
    3 Basal leaves 3-many-lobed, palmately or pinnately; [collectively widespread].
      4 Leaf lobing pinnate.
        5 Gynoecium of separate pistils (each with a single carpel); fruit an aggregate
        5 Gynoecium of a single pistil (with 2, rarely more, carpels); fruit simple.
          6 Stamens many; sepals 2, petals 4; fresh plants with yellow, orange, or white milky juice
          6 Stamens 4, 5, or 6; sepals 4 or 5; petals 4 or 5.
             7 Petals 4, distinct; stamens 6
             7 Petals 5, fused; stamens 2, 4, or 5.
               8 Corolla radially symmetrical; stamens 5
               8 Corolla 2-lipped, bilaterally symmetrical or asymmetrical; stamens 2 or 4.
                 9 Corolla lobes not twisted, the flower bilaterally symmetrical; stamens 2
                 9 Corolla lobes twisted so as to make the flower asymmetrical; stamens 4
      4 Leaf lobing palmate.
                          13 Petals 5; stamens 5; fruit a schizocarp of 2 mericarps.
                            14 Fruit smooth; leaves with 5 or more lobes
                              15 Gynoecium of separate pistils (each with a single carpel); fruit an aggregate.
                                  17 Carpels partly fused, arrayed in a ring of 10-20
                                16 Perianth of a single whorl of 3-12 petaloid sepals (the petals absent or small and rudimentary).
                                    18 Leaves 2, the single flower terminal and associated with the upper leaf; fruit an aggregate of berries
                                    18 Leaves normally > 2, flowers not as above; fruit an aggregate of achenes, utricles, or follicles
                                         20 Petals distinct; leaves with rounded lobes or teeth.
                                           21 Corolla radially symmetrical; petals 8-12; capsule fusiform, narrowed to both ends, > 5× as long as wide
  2 Basal leaves not lobed, at most serrate or crenate (and sometimes also cordate, hastate, auriculate, or peltate at the base).
                                                 24 Inflorescence either a terminal spike, or a 1-7-flowered terminal cyme, or of a solitary axillary or terminal flower; fruit various; perianth biseriate (of differentiated sepals and petals (except uniseriate, of 3 fused sepals in ARISTOLOCHIACEAE).
                                                      26 Flowers bilaterally symmetrical; inflorescence a terminal spike (with > 20 flowers); petals 4, usually scarious, transparent; sepals 4, green; stamens 4
                                                      26 Flowers radially symmetrical; inflorescence either of a solitary flower or of a 1-7-flowered terminal cyme; petals 5, 8-12, or 0; sepals 5 (green), 3 (brown), or 5-9 (yellow); stamens 5, 12, or many.
                                                        27 Gynoecium of separate pistils (each with a single carpel); fruit an aggregate of achenes or follicles; flowers bright yellow, either of 5-9 distinct petaloid sepals, or of 8-12 distinct petals subtended by 3-4 green distinct sepals
                                                        27 Gynoecium either of a single pistil with 6 carpels or of a single pistil with 4 carpels or of 2 nearly separate carpels; fruit a simple capsule (or deeply 2-lobed); flowers white, brown, or greenish, either of 5 fused or distinct white petals and 5 fused or distinct green sepals, or of 3 fused brown or greenish petaloid sepals.
                                                          28 Flowers brown or green, of 3 fused brown or greenish petaloid sepals (and 0 petals); carpels 6; stamens 12; leaves 4-10 cm wide
                                                          28 Flowers white, of 5 white or whitish petals and 5 green sepals; carpels 2; stamens 5; leaves 1-12 (-15) cm wide
                                                                 31 Gynoecium of separate pistils (each with a single carpel); fruit an aggregate; perianth of 5 green sepals and 5 colored petals.
                                                                           36 Inflorescence a terminal raceme; perianth of 4 green sepals and 4 white petals; fruit a silique/silicle; fresh foliage in spring and summer with a strong garlic odor; larger leaves < 10 cm in diameter
                                                                           36 Inflorescence a terminal panicle; perianth of 6 cream-colored petaloid sepals; fruit a winged achene; fresh foliage lacking a garlic odor; larger leaves typically > 30 cm in diameter
                                                                                  39 Leaves tubular, with a sutured ventral flange, erect or reclining, adapted as a pitfall for insects (flat, phyllodial leaves sometimes present as well, common in the winter in some species, such as S. oreophila)
                                                                                    40 Stem leaves opposite; perianth 5-merous, at least the corolla bilaterally symmetrical (barely so in VALERIANACEAE), or the parts curved so as to be asymmetrical (Pedicularis in OROBANCHACEAE); stamens 2, 3, or 4.
                                                                                        42 Corolla distinctly 2-lipped (with prominently large upper and lower corolla lobes) or hooded (the upper lip hood-like), distinctly bilaterally symmetrical, or the lobes twisted so as to make the corolla asymmetrical.
                                                                                    40 Stem leaves alternate; perianth radially symmetrical (less commonly bilaterally symmetrical); stamens 5, 6-8, 9, 10 (rarely 4).