BRASSIACEAE. 165 



Plants not densely cespitose ; stem-leaves lanceolate-sagittate ; basal leaves 

 oblanceolate or spatulate. lo. A. divaricarpa. 



Plants densely cespitose ; stem-leaves oblong or lance-oblong, indistinctly 

 auricled; basal leaves narrowly linear-oblanceolate. ii. A. oxylobula. 



1. Arabis ovata (Pursh) Poir. {A. hirsuta Hook., in part; not L.) In 

 waste places and sandy or rocky soil from N. B. and Alb. to Ga. and Calif. — 

 Alt. 4000-10,000 ft. — Boulder Cafion; Mancos; Ojo; Cucharas River, below La 

 Veta; Pagosa Springs; West Indian Creek; South Park; Chicken Creek, La 

 Plata Mountains ; North Cheyenne Canon ; Williams' Canon ; butte, 5 miles 

 southwest of La Veta ; foot-hills, Larimer Co. ; Horsetooth Gulch ; gulch 

 south of Boulder; Spring Canon; Moon's ranch; Dixon Canon; gulch west of 

 Soldier Canon; Rustic; Cache la Poudre; South Park; Colorado Springs; 

 Castle Canon; Cimarron; Lake City; Eldora to Baltimore. 



2. Arabis philonipha A. Nelson. On hillsides from Mont, and Wash, to 

 Colo, and Utah. — Alt. up to 9500 ft. — -Breckenridge; Villa Grove; mountains 

 between Sunshine and Ward. 



3. Arabis oxyphylla Greene. On hillsides and in canons from Wyo. to 

 Colo, and Utah. — Alt. 7000-11,500 ft. — Cucharas River, below La Veta; 

 Chicken Creek, West La Plata Mountains ; Hounold ; Cripple Creek road ; 

 near Pagosa Peak; near Chambers' Lake; Carson; Cerro Summit; Van 

 Boxle's ranch, above Cimarron; Dark Canon; Alpine Tunnel; Empire; Camp 

 Creek, and Beaver Creek, Larimer Co. 



4. Arabis connexa Greene. In the mountains from Mont, to Colo, and 

 Utah. — Alt. 9000-11,000 ft. — Lake City; near Pagosa Peak; headwaters of 

 Sangre de Cristo Creek; Eldora to Baltimore. 



5. Arabis oblanceolata Rydb. On mountains in Colo. — Alt. about 10,000 

 ft. — ^Valley Spur. 



6. Arabis Crandalii Robinson. (_A. stenoloha Greene) In the mountains of 

 Colo. — Alt. about 7000 ft. — Cimarron. 



7. Arabis Selbyi Rydb. {A. recondita Greene, in part) On mountains of 

 Colo. — Alt. 7000-9500 ft. — West of Ouray; Glenwood Springs (the last speci- 

 men included by Dr. Greene in A. recondita Greene, but does not agree with 

 the description). 



8. Arabis consanguinea Greene. In the mountains of Colo. — Alt. 7000-gooo 

 ft. — Los Finos; headwaters of Pass Creek; Van Boxle's ranch, above 

 Cimarron. 



g. Arabis Fendleri (S. Wats.) Greene. {A. Hoelboellii Fendleri S. Wats.) 

 In the mountains of Colo, and N. M. — Alt. 7000-10,000 ft. — Georgetown; 

 Como; butte, 5 miles southwest of La Veta; Wahatoya Cation; river bluffs 

 north of La Veta; hills southeast of La Veta; Mancos. 



10. Arabis divaricarpa A. Nels. On dry hills from Ass. to Colo, and Utah. 

 —Alt. 8000-9500 ft— Mountains between Sunshine and Ward. 



11. Arabis oxylobula Greene. In the mountains of Colo. — Leadville; Trap- 

 per's Lake; Glenwood Springs. 



12. Arabis lignifera A. Nels. In the mountains of Wyo. and Colo. — Alt. 

 about 8000 ft. — Columbine. 



13. Arabis rhodantha Greene. In the mountains of Colo, and Utah. — Alt. 

 up to 8000 ft. — Mancos; Ojo. 



