BRASSIACEAE. 163 



11. Draba chtysantha S. Wats. On alpine peaks of Colo, and N. M. — Alt. 

 12,000-13,000 ft. — Gray's Peak. 



12. Diaba graminea Greene. On alpine peaks of Colo. — Alt. about 12,500 

 ft. — Telluride ; Carson. 



13. Draba crassa Rydb. On alpine peaks of Wyo. and Colo. — Alt. 8000- 

 12,500 ft. — Cumberland Mine, La Plata Mountains. 



14. Draba streptocarpa A. Gray. On alpine peaks and rocky places in the 

 higher mountains of Colo. — Alt. 6000-13,000 ft. — Pike's Peak; headwaters of 

 Clear Creek; South Park; Gray's Peak; West Indian Creek; West Spanish 

 Peak; near Colorado Springs; headwaters of Sangre de Cristo Creek; moun- 

 tains near Veta Pass; North Cheyenne Canon; Robinson; northwest of 

 Como; east of Cameron Pass; Pennock's mountain ranch; Beaver Creek; 

 Chambers' Lake ; Crystal Park ; Gentian Ridge ; headwaters of Clear Creek 

 and alpine ridges east of Middle Park; Gray's Peak; South Park; Empire; 

 Eldora to Baltimore. 



Draba streptocarpa Grayana Rydb. Alpine peaks of Colo. — Alt. 12,000- 

 13,000 ft. — Mountains northwest of Como; Gray's Peak trail. 



15. Draba spectabilis Greene. In the mountains of Wyo. and Colo. — Alt 

 9000-12,000 ft. — Near Ironton, San Juan Co.; Cumberland Basin and Bob 

 Creek, La Plata Mountains; Upper La Plata Canon; Mt. Hesperus; moun- 

 tains about Ouray; Red Mountain. 



16. Draba Helleriana Greene. {D. oxyloba Greene.) In the mountains of 

 Colo, and N. M. — Alt. 8000-10,000 ft. — Sargent's; Van Boxle's ranch, above 

 Cimarron; Grayback Mining Camps; headwaters of Sangre de Cristo Creek; 

 Ojo; Silverton. 



17. Draba luteola Greene. In the mountains of Colo. — Alt. 9000-12,000 ft. 

 — Cumberland Basin, La Plata Mountains; Idaho Springs; Upper Canon of 

 the La Plata; near Pagosa Peak; Eldora to Baltimore. 



18. Draba aureiformis Rydb. {D. Bakeri Greene.) In the mountains of 

 Colo, and the Black Hills of S. D. — Alt. 9000-11,000 ft.^Near Graymont; 

 headwaters of Pass Creek; Carson; Palsgrove Canon. 



19. Draba aurea Wahl. Among rocks in the higher mountains and in sub- 

 arctic regions from Greenl. to B. C. to Colo, and Ariz.; also in northern 

 Europe. — Alt. 9000-13,000 ft. — Headwaters of Clear Creek; Massif de 1' Arapa- 

 hoe ; Battlement Crag, Pike's Peak ; Como ; West Spanish Peak ; near Iron- 

 ton, San Juan Co.; between Bald Mountain and Seven Lakes; Dark Canon; 

 Cripple Creek road; vicinity of Como; Boreas; Silverton; Leroux Creek; 

 Chambers' Lake; Graymont; Alpine Tunnel; Grand Lake; Mt. Abram, 

 Ouray; Mt. Baldy; Mt. Garfield; Middle Park; Eldora to Baltimore. 



20. Draba decumbens Rydb. Alpine peaks of Colo. — Alt. 12,000-13,000 ft. 

 — Gray's Peak. 



22. CARDAMINE L. Bitter-cress. 



Leaves all entire ; blades more or less cordate, dentate. 



Plant glabrous or nearly so. 1. C. cordifolia. 



Plant, at least the stem, densely pilose ; leaves also hairy. 2. C. infausta. 

 Leaves, at least some of them, pinnate. 



Petals about s mm. long ; leaflets 1-7 ; the terminal much larger, cordate, ovate 

 or reniform, sinuately toothed. 3. C. vallicola. 



Petals 2-4 mm. long; leaflets 5-15, from linear to obovate. 



