Nicotiana L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 201

16. Nicotiana L. 1

Annual to perennial herbs, rarely shrubs. Leaves alternate, simple. Flowers actinomorphic or zygomorphic, pedicellate, in a terminal panicle or false raceme. Calyx subglobose to tubular, sometimes campanulate or cupuliform, 5-dentate, persistent, often somewhat inflated in fruit. Corolla tubular or infundibuliform; limb 5-lobed (rarely subentire). Stamens 5, subequal or 1 shorter, included (rarely slightly exserted). Stigma capitate. Fruit a capsule, dehiscing by 2 or 4 distal valves.

Literature: T. H. Goodspeed, The Genus Nicotiana . Waltham, Mass. 1954.

1 Shrub; leaves glabrous, glaucous 1. glauca 1 Herb; leaves viscid-pubescent, not glaucous

2 Petiole not winged 2. rustica 2 Petiolewingedor absent

3 Inflorescence a panicle; stamens inserted in basal half of corolla-tube 3. tabacum

3 Inflorescence a false raceme; stamens inserted in distal half of corolla-tube 4. alata