DATURA SOLANACE 499 
NICOTIANA 
always entire, rarely wavy but never sinuately toothed, thickish : pedun- 
cles 5-10 lines long, reflexed in fruit: calyx strigose-villous, rarely glabrous, 
its lobes triangular-lanceolate: corolla dull yellow with a brownish centre, 
about 8 lines broad: fruiting calyx rounded ovoid, not sunken at the base, 
indistinctly 10-angled: berry yellow or greenish. On dry prairies, Idaho 
and eastward to Tilinois and the Carolinas. 
Tribe 2 Hyoscyamex Endl, Gen. 664. Corolla with the limb 
either plicate or imbricate in the bud. Stamens 5,all perfect. Fruit 
a 2-celled, or falsely 4-celled capsule. Seeds flattened. Embryo 
curved: the semiterete cotyledons not broader than the radicle. 
3 DATURA L. Gen. n. 246. 
Herbs shrubs or trees with alternate leaves and large white 
purple or violet flowers solitary in the forks of the stem or branch- 
es. Calyx elongated-tubular or prismatic, its apex 5-cleft or 
spathe-like in our species circumscissile near the base. Corolla 
funnelform the limb plaited, 5-lobed. Stamens inserted at or 
below the middle of the corolla-tube, included or but little exsert- 
ed: filaments filiform. Ovary 2-celled or falsely 4-celled: style fili- 
form ; stigma slightly 2-lobed. Capsule 4-valved from the top or 
bursting irregularly. } 
D. srramoNntum L. Sp. 179. Glabrous or the young parts sparingly 
pubescent: stem stout, 1-5 feet high from an annual root, freely branching : 
leaves thin ovate in outline, acute or acuminate at the apex, mostly nar- 
rowed at the base, 3-8 inches long, irregularly sinuate-lobed, the lobes 
acute, on petioles 1-4 inches long: calyx prismatic, less than half the length 
of the corolla, circumscissile near the base: corolla white 3-4 inches high, 
the limb 144-2 inches broad: capsule.erect, thickly armed with short stout 
rickles, the lowest ones mostly shortest. In fields and waste places, Brit. 
Bolumbia to California and across the Continent. Introduced trom Asia. 
Tribe 3 Cestrinex Corolla with regular limb induplicate-valvate 
or induplicate-imbricate in the bud. Stamens all perfect. Fruit 
either baccate or capsular: seeds little or not at all flattened. Embryo 
either straight or only slightly curved, the cotyledons usually broader 
than the radicle. 
4 NICOTIANA Tourn. L. Gen. n. 248. 
Annual or perennial herbs with large alternate leaves and rath- 
er large white, yellow, greenish or purplish flowers in terminal, 
often bracted racemes or panicles. Calyx tubular-campanulate 
or ovoid, 5-cleft, persistent. Corolla funnelform or salverform, 
plicate and somewhat imbricate in. the bud, filaments filiform, 
mostly included, inserted on the tube of the corolla: anthers ovate 
or oblong often explanate after dehiscence. Ovary normally 2- 
celled, with long and thick placenta bearing very numerous 
ovules and seeds. Style slender: stigma depressed-capitate and 
often 2-lobed. Fruit a capsule, more or less invested by the calyx, 
septicidal and also usually loculicidal at summit, the valves or 
teeth thus becoming twice as many as cells. Seeds very small, 
with granulate or rugose-foveolate testa. Cotyledons little broader 
than the radicle. Ours all annuals with white or greenish flowers. 
