994 SOLANACEAE 



acuminate, glabrous, undulate or repand-dentate, slender-petioled : calyx 5-6.5 cm. 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 branclied : leaf-blades ovate to oval-ovate, 10-15 cm. long, acute or 

 acuminate, sinuate-toothed : calyx 10-12 cm. long; lobes lanceolate, acuminate : corolla 

 white, suftused 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 M^tel 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 obliqvie 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 cm. 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. NICOTIAN A 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. A', repanda. 



Corolla-tube stout, 2^ 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 cm. long": calyx-lobes acute, fully as broad as long: panicle- 

 branches pubescent. 4. JV^. rustica. 

 Corolla 3.5-4 cm. 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 cm. 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 cm. long; tube slender; limb 2.5-3 cm. 

 broad, the lobes ovate to ovate-lanceolate : capsules oblong-ovoid, about as long as the 

 calyx. 



In waste places, eastern and southern United States. Native of South America. Summer and fall. 



2. Nicotiana repanda Willd. Annual, minutely pubescent or glabrate above. 

 Stems 3-7 dm. tall, often widely branching : leaf-blades membranous, suborbicular or oval- 

 oblong, 5-15 cm. long, repand, the lower abruptly contracted into petiole-like bases, the 

 upper sessile and clasping : pedicels 5-12 mm. long : calyx 8 mm. becoming 12 mm. long ; 

 tube campanulate ; lobes linear, or nearly so, longer than the tube : corolla 4-6 cm. long ; 

 limb white or tinged with pink, 1.5-2.5 cm. broad, the lobes ovate : capsules ovoid, about 

 1 cm. broad. 



In sandy soil, Texas and Mexico. Spring. 



3. Nicotiana trigonophylla Dunal. Annual, viscid-pubescent. Stems erect, 3-10 

 dm. tall, simple or widely branched : leaf-blades oblong or oblanceolate, 3-10 cm. long, 

 entire, somewhat clasping : racemes simple or loosely paniculate : pedicels 3-11 mm. long : 

 calyx usually longer than the pedicels ; lobes linear or lanceolate-subulate, about as long 

 as the tube :" corolla 1.5-2 cm. long, yellowish or greenish white ; tube stout, slightly con- 

 stricted at the throat ; limb 8-12 mm. broad, the lobes triangular or ovate-triangular : 

 capsules ovoid, 5-10 mm. long. 



In sandy soil, Texas to California and Mexico. Spring to fall. 



4. Nicotiana rustica L. Annual, finely pubescent. Stems 5-12 dm. tall, branched : 

 leaf-blades ovate or broadly ovate, 5-20 cm. long, entire, thin, petioled : panicles open : 



