SOLANACEAE. 



[Vol. III. 



5. Solanum Torreyi A. Gray. 



Torrey's Nightshade. (Fig. 3215.) 

 SI Torreyi A. Gray, Proc. Am. Acad. 6: 44. 1862. 



Perennial, hoary with a stellate pubescence of 

 8-12-rayed hairs, more or less armed with small 

 subulate prickles. Leaves ovate in outline, 3'- 

 6' long, sinuately 5-7-lobed, the lobes entire or 

 undulate, obtuse; cymes appearing terminal, 

 soon evidently lateral, branched, loosely several- 

 flowered; flowers showy, large; calyx-lobes 

 ovate, abruptly long-acuminate, persistent at the 

 base of the berry; corolla violet, i / -i>^ / broad, 

 its lobes ovate, acute; berry globose, smooth and 

 glabrous, \' or more in diameter, yellow when 

 ripe. 



On dry plains and prairies, Kansas to Texas. 



6. Solanum rostratum Dunal. 



Sand Bur. Beaked Nightshade. 



(Fig. 3216.) 



Solatium rostratum Dunal, Sol. 234. pi. 24. 1813- 

 Solanum heterandrum Pursh, Fl. Am. Sept. 156. 



fit. 7. 1814. 



Annual, densely stellate-pubescent with 

 5-8-rayed hairs, usually copiously armed with 

 yellow subulate prickles; stem erect, branch- 

 ed, \-2% high. Leaves ovate or oval in 

 outline, irregularly pinnately 5-7-lobed or 

 l-2-pinnatifid, 2 / -5 / long, petioled, the lobes 

 mostly oblong, obtuse; flowers racemose, 

 yellow, about x' broad; racemes lateral; pedi- 

 cels stout, 3 // -6 // long, erect both in flower 

 and fruit; calyx densely prickly, surround- 

 ing and wholly enclosing the berry, the 

 prickles becoming as long as the fruit, or 

 longer; calyx-lobes lanceolate, acuminate; 

 corolla about 1/ broad, slightly irregular, its lobes ovate, acute; stamens and style de- 

 clined, the lowest stamen longer with an incurved beak; fruit, including its prickles, i' in 

 diameter or more. 



On prairies, Nebraska to Texas and Mexico. Occasional in waste places as a weed, Ontario to New 

 Jersey, adventive from the west. May-Sept. The original food of the Colorado beetle or potato-bug. 



7. Solanum heterodoxum Dunal. 

 Melon-leaved Nightshade. (Fig. 3217.) 



Solanum heterodoxum Dunal, Sol. 235. pi. 25. 1813. 

 Solanum citrnllifolium Braun, Ind. Sem. Frib. 1849. 



Annual, glandular-pubescent, or a few 4-5-rayed 

 hairs on the leaves, copiously armed with slender 

 yellow subulate prickles, diffusely branched, i-3' 

 high. Leaves irregularly bipinnatifid, resembling 

 in outline those of the watermelon, 2 / -6 / long; 

 racemes lateral, several-flowered; flowers I'-ljS^' 

 broad, violet; stamens and style declined; lowest 

 anther violet, larger than the four other yellow 

 ones; corolla somewhat irregular, its lobes ovate, 

 acuminate; fruit similar to that of the preceding 

 species. 



In dry soil, Kansas (according to Smyth), toTexas r 

 Mexico and New Mexico. July-Sept. 



