- Nicotiana
Key to the species of Nicotiana
1Perennial soft-wooded shrub or small tree to 6 m high; corolla yellowNicotiana glauca 1Annual or short-lived perennial herb to 3 m high; corolla white or pink2 2Plant 1–3 m high; filaments of all stamens inserted near base of corolla-tube; inflorescence short, dense, panicle-like; corolla white or pink3 2Plant usually less than 1 m high; filaments of 4 stamens inserted near summit of corolla-tube; inflorescence elongated, loose, panicle- or raceme-like, or flowers solitary in axils; corolla white4 3Leaves radical and cauline, upper ones subsessile to sessile; corolla white, trumpet- shaped; corolla-tube 65–85 mm longNicotiana sylvestris 3Leaves nearly all cauline, upper ones shortly petiolate; corolla white to pink, funnel- shaped; corolla-tube 30–55 mm longNicotiana tabacum 4Plant glabrous or almost so (more or less glandular-hairy on flowers and sometimes sparsely hairy on lower stems)5 5Corolla-tube less than 20 mm long, less than 3 mm wide at apex of calyx, limb less than 12 mm diam.; seeds C-shapedNicotiana goodspeedii 5Corolla-tube 20–55 mm long, mostly 3–5 mm wide at apex of calyx, limb 14–35 mm diam.; seeds reniform or angledNicotiana suaveolens From: Jeanes, J.A. (1999). Solanaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria. Vol. 4. Cornaceae to Asteraceae. Inkata Press, Melbourne.
