436 SOLANACEAE (POTATO FAMILY) 



1. Solanum Jamesii Torr. Ann. Lye. N. Y. 2: 227. 1828. Perennial from 

 small tubers, 2-3 dm. high: leaves pinnate; the leaflets 7-9, lanceolate to 

 ovate-oblong, smoothish, the lowest often smaller but with no small ones 

 interposed: peduncles cymosely few-several-flowered: corolla white, deeply 

 5-cleft: fruit not inclosed in the somewhat enlarged calyx. A relative of the 

 potato (S. tuberosum), which is native in South America. Mountains of 

 Colorado to New Mexico and Arizona. 



2. Solanum triflorum Nutt. Gen. 1: 128. 1818. Green, slightly hairy or 

 nearly glabrous, low and much spreading: leaves oblong, deeply pinnatifid, 

 with wide-rounded sinuses; the lobes 7-9, lanceolate, entire or dentate: pe- 

 duncles 1-3-flowered: corolla small, white, a little longer than the 5-parted 

 persistent calyx: berries green, 10-12 mm. in diameter, on nodding pedicels. 

 WILD TOMATO. Abundant and prolific; throughout our range on the plains, 

 mostly in waste and cultivated ground. 



3. Solanum nigrum L. Sp. PL 186. 1753. Low annual, much branched 

 and often spreading, nearly glabrous, rough on the angles: leaves ovate, 

 repand-dentate: flowers white, in small umbel-like lateral clusters, drooping: 

 calyx spreading, shorter than the corolla: filaments hairy: berries black when 

 ripe, 7-8 mm. in diameter. (S. interius Rydb. Bull. Torr. Bot. Club 31: 641. 

 1904.) COMMON NIGHTSHADE. In our range an introduced weed in waste 

 ground. 



3a. Solanum nigrum villosum Mill. Low, somewhat viscid-pubescent: 

 leaves angulate-dentate : berries varying from yellow to black. [S. villosum 

 (Mill.) Lam.] Adventive and infrequent. 



4. Solanum rostratum Dunal, Sol. 234. pi. 24. 1813. Densely hoary or 

 yellowish with stellate pubescence and armed with yellow prickles: leaves 

 ovate or oval in outline, deeply and irregularly pinnately lobed or often 

 1-2-pinnatifid: corolla yellow, about 25 mm. broad, the lobes ovate: stamens 

 and style declined, the lowest stamen larger and longer and with an incurved 

 beak: fruit inclosed by the close-fitting and horridly prickly calyx. BUFFALO 

 BUR. Indigenous in our range on sandy plains; eastward becoming a weed. 



5. Solanum heterodoxum Dunal, Sol. 235. pi. 25. 1813. Pubescent with 

 gland-tipped simple hairs, with a few 5-rayed ones on the upper face of the 

 irregularly or interruptedly bipinnatifid leaves, which are armed with yellow 

 subulate prickles; stems branched, 3-8 dm. high: corolla violet, 3-4 cm. broad, 

 5-cleft and somewhat irregular; the lobes ovate-acuminate: stamens unequal, 

 the larger one violet, the others yellow: fruit as in the preceding. From 

 Colorado to Texas. 



6. Solanum elaeagnifolium Cav. Icon. 3: 22. 1794. Silvery-canescent with 

 dense, scurf-like stellate pubescence; stem branched, armed with sharp prickles 

 which are rarely wanting: leaves oblong-lanceolate to linear, 4-10 cm. long: 

 flowers on short stout peduncles: the corolla angulate, 5-lobed: calyx-lobes 

 slender: berry at first green, then yellow, finally black, on reflexed pedicels, 

 about 10 mm. in diameter. Frequent in Colorado; extending to Kansas and 

 Texas. 



5. DATURA L. THORN APPLE 



Rank narcotic-poisonous weeds, with ovate leaves and large showy flowers 

 on short peduncles in the forks of the branching stem. Calyx prismatic or 

 tubular, 5-toothed, separating transversely above the base in fruit. Corolla 

 funnelform with a large and spreading 5 or 10-toothed plaited border. Fruit 

 a globular or ovate prickly capsule, 4-valved, 2-celled, with 2 thick placentae 

 projected from the axis into the middle of the cells. Seeds large and flat. 



Stem purple; flowers violet or lavender . . . , . . 1. D. Tatula. 

 Stem green; flowers white. 



Leaves irregularly sinuate-lobed . . . . . . . 2 D. Stramonium. 



Leaves unequally ovate, repand-entire 3. D. meteloides. 



1. Datura Tatula L. Sp. PI. Ed. 2. 256. 1762. Sparingly pubescent, 

 moderately stout, 3-12 dm. high; stem purple: leaves sinuate-lobed, 1-2 dm. 

 long; the lobes acute: flowers about 1 dm. long, violet or lavender: calyx 



