160 
BRASSIACEAE. 
6. Erysimum oblanceolatum Rydb. In the mountains of Wyo. and Colo.— 
Alt. 5000-11,000 ft.—Golden; near La Plata Post Office; Hamor’s Lake, above 
Durango; Williams’ Canon; near Pueblo; Georgetown; Stove Prairie Hill; 
Cameron Pass; Dixon Canon; plains and foot-hills near Boulder; Alpine 
Tunnel; Cimarron. 
7. Erysimum Bakeri (Greene) Rydb. ( Chieranthus aridus Greene; C. 
Bakeri Greene) On dry hills in Colo, and N. M.—Golden City. 
8 . Erysimum argillosum (Greene) Rydb. ( C . argillosus Greene) On dry 
mesas and bluffs of Colo.—Alt. about 5000 ft.—Pueblo; plains near Denver; 
bluffs north of La Porte. 
9. Erysimum nivale (Greene) Rydb. (C. nivalis Greene) In the higher 
mountains of Wyo. and Colo.—Alt. 11,000-13,000 ft.—Mountains northeast 
of Boreas; mountains above Graymont; mountain northwest of Como; above 
Ouray; Carson; Argentine Pass; Mt. Hesperus, above timber line; Slide 
Rock Canon; West La Plata Mountains. 
10. Erysimum radicum Rydb. On the higher peaks of Colo.—Alt. 10,000- 
13,000 ft.—Pike’s Peak; Bottomless Pit. 
11. Erysimum Wheeleri S. Wats. ( E. asperum alpestre Cockerell) On 
dry hills and plains in the mountains from Colo, and Utah to Tex. and Ariz. 
—Alt. 5000-12,000 ft.—Mountains between Sunshine and Ward; plains and 
foot-hills near Boulder; East Indian Creek; Turkey Creek and tributaries; 
Veta Mountain; Ojo; west slope Bald Mountain; Slide Rock Canon, West 
La Plata Mountains; foot-hills near Ft. Collins; mountains near Veta Pass; 
headwaters of Pass Creek; Horsetooth Gulch; Howe’s Gulch; Montrose; 
Dillon Canon; Chicago Lakes; near Boulder. 
12. Erysimum amoenum (Greene) Rydb. ( Cheiranthus nivalis amoenus 
Greene.) On the higher peaks of Colo.—Alt. 10,000-13,000 ft.—La Plata 
Mountains; Silverton; near Ironton, San Juan Co.; Mt. Abram; mountains 
near Ouray; Berthoud Pass. 
17. BARBAREA L. Winter-cress, Scurvy-grass. 
„ Pods sharply 4-angled, stout-pediceled ; leaf-segments 4-8 pairs. 1. B. praecox. 
Pods obtusely 4-angled ; leaf-segments 1-4 pairs. 2. B. americana. 
1. Barbarea praecox (J. E. Smith) R. Br. In waste places from N. Y. 
to Wash., Fla. and Calif.; sparingly introduced from Europe.—Hotchkiss. 
2. Barbarea americana Rydb. ( B . vulgaris gracilis S. Wats.; not DC.) 
In rich soil from Sask. and Mont, to Colo, and Nev.—Between Eldora and 
Baltimore. 
18. SINAPIS L. White Mustard. 
1. Sinapis alba L. Introduced in grain fields and waste places from Me. 
to B. C. and Calif.—Ft. Collins. 
19. BRASSICA L. Wild Mustard, Turnips, Cabbage. 
Pedicels 1-2 cm. long; plant glabrous. 1. B. juncea. 
Pedicels about 5 mm. long; plant sparingly hispid. 2. B. arvensis. 
1. Brassica juncea (L.) Coss. Sparingly introduced from Europe; in 
waste places from N. H. to Colo., Va. and N. M.—Alt. about 8000 ft.—Hills 
about Box Canon, west of Ouray. 
