. POTATO FAMILY 759 



campanulate, lurid-yellowish, purple-veined, 2 cm. long. Waste places and 

 around dwellings: N.S. N.Y. Colo. Mont.; nat. from Eu. My-S. 



9. DATURA L. THORN APPLE, JIMSON WEED, JAMESTOWN WEED, 

 STRAMONIUM. 



Annual or perennial herbs, or in the tropics shrubs or trees, narcotic. Leaves 

 alternate, mostly lobed. Flowers perfect, regular, solitary in the axils. Calyx 

 prismatic-funnelform, 5-lobed. Corolla funnelform, plaited, 5-lobed; lobes 

 acuminate. Stamens 5, included, adnate to near the middle of the corolla-tube. 

 Ovary 2-celled or falsely 4-celled; stigma 2-lobed. Capsule more or less prickly, 

 4-valved or splitting irregularly. 



Corolla 1.5-2 dm. long; capsule more or less fleshy, bursting irregularly. 



1. D. meteloides. 



Corolla about 1 dm. long; capsule dry, 4-valved. 

 Capsule erect; plant glabrous. 



Corolla white; lower prickles of the capsule shorter. 2. D. Stramonium. 



Corolla violet; prickles all alike. 3. D. Tatula. 



Capsule nodding; plant more or less cinereous. 4. D. discolor. 



1. D. meteloides DC. Annual or perennial; stem erect, 3-10 dm. high, 

 finely grayish puberulent; leaves obliquely ovate, grayish puberulent, repand or 

 nearly entire, 10-15 cm. long; calyx 10-12 cm. long; lobes lanceolate, acuminate; 

 corolla white, often tinged with violet, 15-20 cm. long; lobes with slender tips; 

 capsules subglobose, 4-5 cm., densely short-prickly, reflexed in fruit. Along 

 streams: w Tex. Colo. Calif.; Mex. Son. Submont. Mr-O. 



2. D. Stramonium L. Annual; stems glabrous, 5-15 dm. high, widely 

 branching; leaf-blades ovate to oblong, glabrous, 1-2 dm. long, acute, sinuately 

 or laciniately toothed; calyx 3-5 cm. long; lobes triangular or triangular-lance- 

 olate, 5-7 mm. long; corolla white, 6-10 cm. long; lobes with slender tips; capsule 

 4-6 cm. long, densely prickly. Waste places and cultivated ground: N.S. Fla. 

 Tex. Colo. Minn.; W. Ind. and S. Am.; nat. from Asia. My-D. 



3. D. Tatula L. Annual; stem 5-15 dm. high, glabrous, purplish, branched; 

 leaf-blades ovate to oblong, sinuately or angulately toothed, glabrous; calyx 3-6 

 cm. long; lobes triangular-lanceolate, 4-7 mm. long; corolla violet or lavender, 

 8-11 cm. long; lobes with slender tips; capsule oval or ovoid, 4-6 cm. long, densely 

 prickly. Waste places and fields: Conn. Fla. Tex. Colo. Calif. Wash.; 

 W. Ind. and Mex.; nat. from S. Am. Je-O. 



4. D. discolor Bernh. Annual; stem puberulent, 3-6 dm. high; leaves 

 sinuately or laciniately toothed, 5-15 cm. long, more or less puberulent; calyx 

 about 5 cm. long; teeth lanceolate; corolla white, tinged with purple, 5-7 cm. 

 long; capsule globose, with rather few, very stout prickles, pubescent. Valleys: 

 N.M. Colo. s Calif.; Mex. Son. Ja-S. 



10. NICOTIANA (Tourn.) L. TOBACCO. 



Annual or perennial, viscid-pubescent, narcotic herbs. Leaves alternate, 

 entire or repand. Flowers perfect, regular, in terminal racemes or panicles. 

 Calyx campanulate or tubular-ovoid, 5-lobed. Corolla funnelform, salverform, 

 or nearly tubular; lobes 5, spreading. Stamens 5, included; filaments adnate to 

 the base of the corolla-tube or free; anthers opening lengthwise. Ovary 2-celled, 

 rarely 4-celled; stigma capitate. Fruit a 2- or rarely 4-valved capsule. Seeds 

 numerous. 



Corolla salverform; capsule 2-celled. 



Leaves clasping at the base; flowers diurnal. 1. N. trigonophylla. 



Leaves petioled, not clasping at the base; flowers nocturnal. 2. N. attenuata. 



Corolla funnelform; capsule 4-celled; leaves acute at both ends. 3. N. quadrivalvis. 



1. N. trigonophylla Dunal. Annuals; stem 3-10 dm. high, viscid-pubes- 

 cent; leaves all sessile or the lower with winged petioles, oboyate-oblong, 5-15 

 cm. long, entire, the upper lanceolate, cordately half-clasping; inflorescence 

 paniculate; calyx-lobes subulate-lanceolate; corolla greenish white or yellowish, 

 2-2.5 cm. long, somewhat pubescent. Valleys: Tex. s Colo. s Utah Calif.; 

 Mex. Son. Ap-S. 



