994 SOLANACEAE 
acuminate, glabrous, undulate or repand-dentate, slender-petioled : calyx 5-6.5 em. long ; 
lobes ovate to triangular-ovate, acute or short-acuminate : corolla violet without, white 
within, 14-18 cm. long: capsules oval or ovoid, 4-6 cm. long, armed with stout prickles 
with corrugated bases. 
In waste places, Gulf States. Introduced from the tropics. Spring to fall. 
4. Datura meteloides DC. Annual, closely and finely pubescent. Stems erect, 3-11 
dm. tall, somewhat branched : leaf-blades ovate to oval-ovate, 10-15 em. long, acute or 
acuminate, sinuate-toothed : calyx 10-12 cm. long; lobes lanceolate, acuminate : corolla 
white, suffused with violet, 15-20 cm. long, the limb 12-15 cm. broad, 5-lobed : capsules 
subglobose, 4-5 cm. in diameter. 
In river valleys, Texas to California and adjacent Mexico. Spring to fall. 
5. Datura Métel L. Annual, finely pubescent. Stems 8-15 dm. tall, more or less 
branched : leaf-blades ovate or oblong-ovate, 1-2 dm. long, often abruptly pointed, undu- 
late, or slightly angled, rounded or subcordate at the oblique base; petioles usually shorter 
than the blades: pedicels stout, 1-2 cm. long: calyx 7-12 cm. long; lobes lanceolote or 
triangular-lanceolate, acuminate: corolla white, 10-15 em. long, the limb about 10 cm. 
broad, 10-lobed : capsules oval or globose-ovoid, 3 cm. long, copiously armed with sharp 
prickles. 
In waste places, Rhode Island to Florida. Naturalized from tropical America. Summer and fall. 
12. NICOTIANA L. 
Annual or perennial herbs, with an acid narcotic principle and viscid-pubescent foli- 
age. Leaves alternate: blades entire or repand. Racemes or panicles terminal. Calyx 
pedicelled : tube campanulate to tubular or ovoid: lobes 5. Corolla white, green, 
yellow or purple, funnelform, salverform or nearly tubular: tube commonly longer than 
the limb : lobes 5, spreading. Stamens 5, included : filaments adnate to the base of the 
corolla-tube or free: anther sacs opening lengthwise. Ovary 2-celled or rarely 4-celled : 
stigmas capitate. Capsule 2-valved or 4-valved near the top. Seeds very numerous. 
Corolla-tube very slender, many times longer than the calyx. 
Leaf-blades sessile: calyx-lobes narrowed upward. 1. N. longiflora. 
Leaf-blades clasping: calyx-lobes dilated upward. 2. N. repanda. 
Corolla-tube stout, 2-4 times longer than the calyx. : 
Leaf-blades somewhat clasping: calyx-lobes linear or lanceolate-subulate. 3. N. trigonophylla. 
Leaf-blades petioled : calyx-lobes triangular or ovate-triangular. : 
Corolla 1.5-2 em. long: calyx-lobes acute, fully as broad as long: panicle- E 
branches pubescent. : 4. N. rustica. 
Corolla 3.5-4 em. long; calyx-lobes acuminate, longer than broad: panicle- 
branches glabrous. 5. N. glauca. 
1. Nicotiana longiflora Cav. Annual, viscid and rough-puberulent. Stems 3-10 
dm. tall, branched : leaf-blades spatulate, oblanceolate or oblong, or linear on the upper 
part of the stem, 8-25 em. long, undulate, sessile: racemes elongated and much inter- 
rupted : pedicels 5-15 mm. long: calyx 10-12 mm. long; lobes attenuate, rather shorter 
than the tube: corolla white or purplish, 7-10 em. long; tube slender ; limb 2.5-3 D. 
sees the lobes ovate to ovate-lanceolate: capsules oblong-ovoid, about as long as the 
calyx. 
te waste places, eastern and southern United States. Native of South America. Summer and fall. 
2. Nicotiana repánda Willd. Annual, minutely pubescent or glabrate ibs 
Stems 3-7 dm. tall, often widely branching : leaf-blades membranous, suborbicular or ides : 
oblong, 5-15 cm. long, repand, the lower abruptly contracted into petiole-like aeri : 
upper sessile and clasping : pedicels 5-12 mm. long : calyx 8 mm. becoming 12 mm. veu ; 
tube campanulate ; lobes linear, or nearly so, longer than the tube : corolla 4-6 E (us : 
limb white or tinged with pink, 1.5-2.5 cm. broad, the lobes ovate : capsules ovoid, a 
1 em. broad. 
Insandy soil, Texas and Mexico. Spring. 3-10 
3. Nicotiana trigonophylla Dunal. Annual, viscid-pubescent. Stems erect, ieee 
dm. tall, simple or widely branched : leaf-blades oblong or oblanceolate, er cm ane g: 
entire, somewhat clasping : racemes simple or loosely paniculate : pedicels ere look 
calyx usually longer than the pedicels ; lobes linear or lanceolate-subulate, a iizhtl con- 
as the tube : corolla 1.5-2 cm. long, yellowish or greenish white ; tube stout, sug A 
stricted at the throat; limb 8-12 mm. broad, the lobes triangular or ovate-triang 
capsules ovoid, 5-10 mm. long. 
In sandy soil, Texas to California and Mexico. Spring to fall. iud: 
4. Nicotiana rústica L. Annual, finely pubescent. Stems 5-12 dm. tall, nace : 
leaf-blades ovate or broadly ovate, 5-20 cm. long, entire, thin, petioled : panic 
