1	"Anthers dehiscing by terminal pores or short slits"	2
1	"Anthers dehiscing by slits running the entire length of the loculi"	3
2	"Flowers in axillary clusters or solitary; calyx truncate or minutely 5-10-dentate; leaves always entire"	Lycianthes
2	"Flowers in pedunculate inflorescences; calyx distinctly 5-lobed (rarely shortly so); leaves often lobed or dentate"	Solanum
3	"Flowers unisexual (rudimentary ovary or stamens sometimes present)"	Symonanthus
3	"Flowers bisexual"	4
4	"Stamens 4"	5
4	"Stamens 5"	10
5	"Fruit a berry"	6
5	"Fruit a capsule"	7
6	"Shrubs or trees without spines; flowers in panicles; anthers unilocular"	Duboisia
6	"Spinescent shrubs, intricately branched; flowers in axillary clusters; anthers bilocular"	Lycium
7	"Annual herbs; stamens inserted high on corolla-tube, their filaments short; corolla blue"	"Browallia {Browallia americana}"
7	"Shrubs; stamens inserted at base of corolla-tube; corolla white, cream or yellow, often striated in throat"	8
8	"Anthers bilocular"	Anthocercis
8	"Anthers unilocular"	9
9	"Leafless, spinescent shrubs; stamens and style exserted"	"Crenidium {Crenidium spinescens}"
9	"Shrubs with (sometimes small) leaves; stamens and style not exserted"	Cyphanthera
10	"Fruit a capsule"	11
10	"Fruit a berry, sometimes firm or dryish"	20
11	"Capsule more than 20 mm long, spiny or tuberculate"	Datura
11	"Capsule less than 15 mm long, smooth or nearly so"	12
12	"Calyx enlarged after flowering, the teeth becoming spiny; capsule circumscissile"	Hyoscyamus
12	"Calyx not or scarcely enlarged after flowering, the teeth not becoming spiny; capsule not circumscissile"	13
13	Herbs	14
13	Shrubs	17
14	"Corolla-tube about 1 mm wide for about 3/4 of its length, abruptly dilated at the top into a broad, shallow cup"	"Nierembergia {Nierembergia hippomanica}"
14	"Corolla-tube more than 1 mm wide near the base, widening gradually"	15
15	"Calyx segments fused for about half their length; valves of capsule 4 (rarely 2)"	Nicotiana
15	"Calyx segments free almost to base; valves of capsule 2, entire or bifid"	16
16	"Leaves 5–12 mm long; corolla 5–9 mm long"	"Calibrachoa {Calibrachoa parviflora}"
16	"Leaves 2–7 cm long; corolla mostly longer than 3 cm"	Petunia
17	"Plants single-stemmed or sparingly branched, glabrous; corolla-tube at least 25 mm long"	Nicotiana
17	"Much-branched shrubs with a dense tomentum at least on immature parts; corolla-tube up to 15 mm long"	18
18	"Plants leafless, spinescent; corolla yellow, the tube narrow; stamens and style much exserted"	"Crenidium {Crenidium spinescens}"
18	"Plants leafy; corolla deep violet or white, the tube broad, expanded into a limb at the top or, if narrow, the stamens and style not exserted"	19
19	"Bracts absent from inflorescence; corolla deep violet (rarely white), the lobes densely pubescent on upper (inner) face, cohering and with incurved apices in bud"	Anthotroche
19	"Bracts present within inflorescence; corolla white with purple striations, the lobes glabrous on upper (inner) face, free and erect in bud"	Grammosolen
20	"Calyx enlarged in fruit, becoming longer than berry and often enclosing it"	21
20	"Calyx not or scarcely enlarged in fruit, always shorter than berry"	24
21	"Mature berry bright red or black"	"Withania {Withania somnifera}"
21	"Mature berry various shades of yellow or green, rarely purple, red or orange"	22
22	"Calyx-lobes at fruiting stage much longer than tube, saggitate at base; corolla blue"	"Nicandra {Nicandra physalodes}"
22	"Calyx-lobes at fruiting stage much shorter than tube, not saggitate; corolla purple or yellowish"	23
23	"Inflorescence solitary; corolla yellow, sometimes with dark markings; calyx at fruiting stage not globular, often ribbed"	Physalis
23	"Flowers in lateral cymes; corolla purple; calyx at fruiting stage more or less globular, never ribbed"	Solanum
24	"Corolla stellate, the lobes as long as tube"	Capsicum
24	"Corolla-tube narrow, funnel-shaped or urn-shaped, the lobes much shorter than tube"	25
25	"Spinescent shrubs; leaves somewhat fleshy; corolla funnel-shaped"	Lycium
25	"Non-spinescent shrubs or herbs; leaves not fleshy; corolla urn-shaped or tubular"	26
26	"Erect shrubs or small trees; flowers in panicles or racemes; corolla narrow"	Cestrum
26	"Scrambling or climbing herbs; flowers solitary in axils; corolla urn-shaped"	"Salpichroa {Salpichroa origanifolia}"