346 COXTKIBUTIONS FROM THE NATIONAL, HERBARIUM. 



the Northwest the name "Jim Hill weed" is applied to the species, the ranchmen 

 having associated its appearance with the building of the Great Korthern Railroad. 



3. BURSA Weber. 



1. Bursa bursa-pastoris (L.) Weber. Shepherd's-puese. Frequent at low alti- 

 tudes, in cultivated, waste, or dry ground. Native of Eur. and Asia; naturalized 

 as a weed in N. Amer. {CapseUa bursa-pastoris Medic.) — Anmial, the pubescence of 

 fine branched hairs; leaves on the stem and also forming a rosette at the base of the 

 stem, deeply lobed or toothed, the stem leaves clasping; flowers white; petals 2 mm. 

 long; fruit flat, triangular, 6 to 8 mm. long. 



4. SMELOWSKIA C. A. Mey. 



1. Smelowskia americana Rydb. Wild candytuft. Common above timber line 

 on rock slides or open slopes; rarely found on open slopes at middle altitudes. Idaho 

 and Mont, to Colo. — Perennial, 10 to 20 cm. high, forming dense tufts, densely covered 

 with fine white branched hairs; leaves divided into narrow lobes; flowers white; 

 pods lanceolate or oblong, 7 to 12 mm. long. 



A very handsome plant, which remains in flower only a short time. 



6. PHYSARIA A. Gray. 



1. Physaria did3miocarpa (Hook.) A. Gray. Double bladderpod. On shale 

 slopes of canyons near east entrance. Alta. and Sask. to Colo. — Perennial, 5 to 15 

 cm. high, forming small clumps; basal leaves broadly obovate, 2 to 6 cm. long, entire 

 or somewhat toothed, densely covered with fine white branched hairs; petals yellow, 

 8 to 12 mm. long; pod 7 to 15 mm. broad, constricted at the middle, composed of 2 

 bladder-like cells. 



McClintock states that the Blackfoot Indians used the roots as a remedy for sore 

 throat and for pains in the stomach, and a decoction of the plant to reduce swellings. 



6. LESQUERELLA S. Wats. 



1. Lesquerella spathulata Rydb. Bladderpod. Occasional about the east 

 entrance, on shale slopes or dry hillsides. Man. to Mont, and Utah. — Perennial, 3 

 to 12 cm. high, densely covered with fine white stellate hairs; basal leaves oblanceo- 

 late, 2 to 3 cm. long, entire; petals yellow, 7 to 8 mm. long; pod egg-shaped, 5 mm. 

 long. 



7. CAMELINA Crantz. 



1. Camelina microcarpa Andrzej. False flax. Occasional on the east slope at 

 low altitudes, in waste ground or on open hillsides. Native of Eur.; naturalized in 

 N. Amer. — Annual, 30 to 70 cm. high, the stem finely hairy; leaves lanceolate, 

 clasping; petals 3 to 4 mm. long, yellowish; pod inflated, pear-shaped, 4 to 8 mm. 

 long. 



8. RADICTJLA Hill. Yellowcress. 



Annuals or perennials, growing in wet soil; leaves pinnately lobed; petals yellow; 

 pods terete, cylindric or almost globose. 



Pods slender-cylindric, 8 to 12 mm. long, about 1 mm. thick, usually somewhat curved. 



1. R. curvisiliqua. 

 Pods oval or oblong, 5 to 8 mm. long, 1.5 to 2 mm. thick not curved. 

 Pedicels much shorter than the pods; plants spreading, the stems 10 to 25 cm. long. 



2. R. lyrata. 

 Pedicels nearly or quite as long as the pods, sometimes longer; plants usually 



erect and 30 to 60 cm. high 3. R. terrestris. 



1. Radicula curvisiliqua (Hook.) Greene. Occasional on the east slope at low 

 altitudes, in moist meadows or about pools. Wash, and Oreg. to Wyo. and Mont. — 



