224 MR. GEYER'S ROCKY MOUNTAIN PLANTS. 
12. Œ. serrulata, Nutt. 6. Douglasii, Torr. et Gr. et Am. 1 
p. 502. CE. leucocarpa, Lehm. in Hook. Fl. Bor. Am, 1. p. 
502. 
Has. Gravelly elevated plains, Upper Kanzas and Lower 
Platte Rivers, growing with Psoralea esculenta and ca- 
nescens. June. (n. 165.) 
13. Œ. densiflora, Lindl. Bot. Reg. t. 1593. ; 
Has. Stony water-courses, Spokan plains, growing with | 
Hosackia Purshiana, rare. Flowers purple. June. (n. 591.) 
—A very peculiar plant, with deeply cleft petals and the 
habit of a Lythrum. = 
14. Œ. scapoidea (Chilismia), Nutt.—Torr. et Gr. Am. 1. p. - 
506. 
Has. Slopes of the calcareous argillaceous hills of the Upper - 
Colorado. July, August. (n. 94.)—A most remarkable - 
_ looking plant, extremely unlike any other Œnofhera; found | 
_also in the Rocky Mountains by Mr. Gordon. Mr. Gere se 
specimens are 8-9 inches high. 
15. Œ. contorta, Dougl.—Hook. Fl. Bor. Am. b P- 
= "Torr. et Gr. Am. 1. p. 511. | 
. Has. Growing under bushes of Fremontia, in the sandy 
. . Saline desert of Upper Sweet Water River. July. (n.4 
à Gayophytum diffusum (Trigburneriejs Nutt. Eom et 
Amp. 518. -.— e 
Has. Sandy uideat. at t" Tahintakaines Spokan c 
July. (n. 546) - | ; 
