302 SOLANACEAE. 



10. Physalis hederaefolia A. Gray. On plains and rocky hills from Colo, 

 to Tex. and Calif.— Exact locality not given. 



11. Physalis comata Rydb. On hillsides from Neb. and Colo, to Tex. — 

 Alt. 4000-5500 ft. — New Windsor, Weld Co. 



12. Physalis rotundata Rydb. On plains from N. D. and Colo, to Tex. 

 and N. M. — Sandy valleys, Larimer Co. ; along Poudre River. 



13. Physalis Fendleri A. Gray. On rocky hills and plains from Colo, and 

 Utah to N. M. and Ariz. — Alt. 6000-8000 ft. — Canon City; near Badito, be- 

 tween La Veta and Gardner; Piedra; Durango; Mancos; Walsenburg; 

 Dolores. 



2. QUINCULA Raf. Puple Ground-cherry. 



I. Quincula lobata (Torr.) Raf. (Physalis lobata Torr.) On plains and 

 river bluffs from Kans. and Colo, to Tex. and Ariz. ; also in Mex. — Alt. 

 4000-6000 ft. — Rocky Ford ; Cheyenne Canon ; Spring Caiion ; Ft. Collins ; 

 Dixon Canon ; Boulder ; Longmont. 



3. CHAMAESARACHA A. Gray. 



Pubescence dense, hirsute as well as puberulent. i. C. conioides. 



Pubescence spai-se, puberulent or stellate, hirsute if at all only on the calyx. 



2. C. Coronopus. 



1. Chamaesaracha conioides (Moric.) Britton. (C. sordida A. Gray) In 

 clayey soil from Kans. and Colo, to Tex. and Ariz. ; also in Mex. — Alt. 

 up to 5000 ft. — Lamar; Pubelo. 



2. Chamaesaracha Coronopus (Dunal) A. Gray. On clayey soil from Kans. 

 and Colo, to Tex. and Ariz.— Alt. 4000-6000 ft. — Caiion City ; McElmo Caiion ; 

 mesas near Pueblo; Walsenburg; Trinidad. 



4. ANDROCERA Nutt. 



I. Androcera rostrata (Dunal) Rydb. (Solanuni rostraiurii Dunal; Andro- 

 cera lobata Nutt.) On plains and in river valleys from N. D. and Wyo. to 

 Tex. and N. M. ; also in Mex. ; introduced eastward to N. H. and Fla. — Alt. 

 4000-6000 ft. — Colorado Springs ; Golden ; New Windsor, Weld Co. ; Ft. 

 Collins; Denver; foot-hills west of Ft. Collins; Boulder. 



5. SOLANUM L. Nightshade, Potato. 

 Annuals. 



Leaves pinnatifid. i. 5. trifiornm. 



Leaves sinuately dentate or entire. 



Plant strigose or glabrous ; berry black. 



Leaves glabrous or nearly so ; calyx-lobes obtuse. 2. S. nigrum. 



Leaves decidedly strigose beneath ; calyx-lobes abruptly acutish. 

 Corolla-lobes 3-4 mm. long. 3. .9. interior. 



Corolla-lobes 6-8 mm. long. 4. .S". Douglasii. 



Plant more or less viscid-villous ; fruit greenish or yellowish. 



5. S. villosum. 

 Perennials. 



Plant green, glabrous or pubescent, but not stellate, never prickly ; perennial 



with tubers. 6. 6". Jamesii. 



Plant silvery-white with stellate hairs ; stem often prickly. 7. S. elaeagnifolium. 



