BRASSIACEAE. 165 



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

 oblanceolate or spatulate. 10. A. divaricarpa. 



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

 auricled ; basal leaves narrowly linear-oblanceolate. u. 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 Canon; 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 philom'pha 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. stenoloba 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 7000-9000 

 ft Los Pinos; headwaters of Pass Creek; Van Boxle's ranch, above 

 Cimarron. 



9. 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 Canon; 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. 



u. 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. 



