364 BRASSICACEAE 



at the base, all erect, constricted at the throat and with spreading tips. Petals 

 undulate-crisp, with a narrow blade. Stamens 6, distinct; anthers linear, sagit- 

 tate at the base. Pods flat, linear. Cotyledons accumbent. 



1. C. cordata (Nutt.) Greene. Stems glabrous, 3-6 dm. high; basal leaves 

 spatvdate, thick, usually coarsely toothed, especially towards the summit, pale 

 green; cauline leaves oblong, ellii)tic or ovate, cordate-clasping; petals linear- 

 lanceolate, a little exceeding the sepals; pod flat, 5-7 cm. long, 4 mm. wide; 

 Streptanthus cordatus Nutt. S. argutus and S. crassifolius Greene. S. colora- 

 densis A. Nels. Cartiera arguta and C. crassifolia Greene. Dry places: Wyo. — • 

 N.M.— Calif.— Ore. Son.—Submont. Je-Jl. 



44. CAULANTHUS S. Wats. Wild Cabbage. 



More or less succulent biennials or perennials. Flowers perfect, in elongate 

 racemes. Sepals oblong, often colored, the lateral ones more or less saccate at 

 the base, erect, with spreading tips; calyx closed and more or less urn-shaped. 

 Petals undulate-crisped, with a broad claw and a small narrow blade. Stamens 

 6; anthers linear, sagittate at the base. Pods somewhat flattened or nearly 

 terete, linear; valves 1-nerved, often reticulate-veined; stigmas 2-lobed. Coty- 

 ledons incumbent. 



Stem glabrous; upper leaves reduced. 

 Stem inflated. 



Calyx densely villous. 1. C. crassicaulis. 



Calyx as well as the whole plant glabrous. 2. C. glaber. 



Stem not inflated. 3. C. procerus. 



Stem hirsute, leafy. 4. C. pilosus. 



1. C. crassicaulis (Torr.) S. Wats. Biennial or perhaps perennial; stem 

 inflated, fistulose, 1-2 cm. thick, glabrous, 3-10 dm. high; basal leaves lyrate, 

 glabrous and glaucous, 1-1.5 dm. long; stem-leaves linear or linear-oblanceolate; 

 petals linear, nearly 2 cm. long; pod ascending, terete, 6-9 cm. long, 2 mm. 

 thick. Rocky places and hiUs: Ida. — Utah — Calif. Son. — Suhmont. My-Je. 



2. C. glaber (AI. E. Jones) Rydb. Biennial or perennial; stem fistulose, 

 1-1.5 cm. thick, glabrous, 3-5 dm. high; basal leaves lyrate, about 1 dm. long, 

 glabrous; stem-leaves reduced, linear; petals linear, 15 mm. long; pod unknown. 

 C. crassicaulis glaber M. E. Jones. Dry hills; s Utah — -e Nev. Son. My-Je. 



3. C. procerus (Brewer) S. Wats. Perennial or biennial; stems slender, 

 4-6 dm. high; basal leaves runcinate, glabrous, or the earliest entire, spatulate; 

 stem-leaves narrowly linear to lanceolate; sepals glabrous or nearly so; petals 

 oblong-spatulate, acuminate, with a blunt apex. C. crassicaulis major M. E. 

 Jones. Hills and mountain slopes: Calif. — (? Utah). Son. Je. 



4. S. pilosus S. Wats. Biennial; stem 6-12 dm. high, leafy; lower leaves 

 coarsely toothed or pinnatifid, hirsute, 8-20 cm. long; petals slightly longer than 

 the sepals; pod 1.5 mm. wide, widely spreading or recurved. Sandy soil: B.C. — 

 Ida. — Calif. Son. — Suhmont. 



45. STREP TANTHELLA Rydb. 



Glabrous annual herbs, with entire leaves and branched stems. Flowers 

 perfect in slender racemes. Sepals erect, the outer saccate at the base. Petals 

 crisp and with narrow blades. Stamens distinct; anthers subsagittate at the 

 base. Pod flat, with a long beak. Stigma 2 cleft, with the lobes over the valves. 

 Seeds wing-margined. 



1. S. longirostris (S. Wats.) Rydb. Stem glabrous, with ascending branches, 

 2-4 dm. high; basal leaves ovate-spatulate, soon deciduous; stem-leaves linear 

 or linear-oblanceolate, glabrous; pedicels short, horizontal, or in fruit reflexed; 

 petals oblanceolate, 4 mm. long; pod pendulous, about 5 cm. long; style 3-5 

 mm. long. Arabis longirostris S. Wats. Streptanlhus longirostris A. Gray. 

 Sandy soil: Wyo. — N.M. — Ariz. — Wash. Son. — Suhmont. Ap-Je. 



46. CHLOROCRAMBE Rydb. 



Perennial glabrous herbs; stem simple at least up to the inflorescence. 

 Racemes lax, with slender horizontal or reflexed pedicels. Leaves thin, peti- 



