360 BRASSICACEAE 



mm. long, erect; pods 4-5 cm. long. A. stenoloba Greene. Mountains: Colo. 

 Submont. My-Je. 



16. A. pulchraM. E. Jones. Perennial; stem erect, 3-6 dm. high, stellate- 

 canescent; basal leaves oblanceolate, entire, 3-4 cm. long, densely stellate; stem- 

 leaves linear or linear-lanceolate, not auricled; sepals densely stellate, oblong, 

 5-6 mm. long; petals dark purple, with light claws, 8-10 mm. long; pods 4-6 cm. 

 long, 3 mm. wide; seeds in two rows. Valleys: Nev. Calif. s Utah. Son. 

 My-Je. 



16. A. formosa Greene. Perennial, somewhat woody at the base; stem 

 about 3 dm. high, densely stellate; lower leaves linear-oblanceolate, 2-4 cm. long, 

 densely stellate, thick; stem-leaves linear, sessile; sepals stellate, broadly ellip- 

 tic, rounded and slightly scarious at the apex; petals white, 10-12 mm. long; pod 

 4-5 cm. long, 2-2.5 mm. wide; seeds in two rows. River valleys: n N.M. e 

 Utah (? Colo). Son. Ap-Je. 



17. A. subpinnatifida S. Wats. Biennial or perennial; stem 1.5-5 dm. 

 high; basal leaves linear-oblanceolate, entire or sparingly toothed, 2-4 cm. long; 

 stem-leaves numerous, lanceolate, coarsely toothed; pedicels recurved, 5-10 mm. 

 long; pod 4-7 cm. long, 2-3 mm. wide; seeds in one row. Dry regions: Calif. 

 Ore. -Ida. Nev. Son. 



18. A. MacDougalii Rydb. Perennial; stem 4-6 dm. high, densely stel- 

 late; basal leaves narrowly oblanceolate, 2-4 cm. long, entire or denticulate, 

 densely stellate; stem-leaves linear or linear-lanceolate, sagittate at the base; 

 pedicels reflexed, 5-10 mm. long; pods reflexed, 4-5 cm. long, 1.5 mm. wide; 

 seeds in one row. Mountains: Mont. Nev. Mont. Je. 



19. A. suffrutescens S. Wats. Suffrutescent perennial; shoots of the sea- 

 son 1-3 dm. long, glabrous; leaves narrowly oblanceolate, glabrous or nearly 

 so, thick and shining, 3-5 cm. long; upper stem-leaves lanceolate, somewhat 

 sagittate at the base; petals purplish, 6 mm. long; pods 4-7 cm. long, glabrous, 

 about 4 mm. wide, tapering into a short beak. Mountains: Wash. Ida. 

 Calif. Submont. 'Mont. Je-Au. 



20. A. drepanoloba Greene. Perennial, with several decumbent stems, 

 2-3 dm. high; basal leaves oblanceolate, 1-3 cm. long, minutely stellate; stem- 

 leaves lance-oblong, sagittate, glabrous; petals rose or pink, 6-8 mm. long; pedi- 

 cels spreading, 5 mm. long; pods 3-5 cm. long, 3 mm. wide; style very short. 

 Mountains: Alta. Mont. Jl-Au. 



21. A. Macounii S. Wats. Biennial or perennial, branched at the base; 

 stems 2-3 dm. high, sparingly hirsute below, glabrous above; basal leaves stel- 

 late, oblanceolate, 1-2 cm. long; stem-leaves linear, sagittate at the base, gla- 

 brous; petals 4 mm. long, rose-colored; pedicels spreading; pods glabrous, slightly 

 curved, mostly divaricate, 3-4 cm. long; seeds in one row. Valleys: B.C. Sub- 

 mont. My. 



22. A. arcoidea A. Nels. Perennial, with a woody taproot, and short 

 branched caudex; stems erect, 2-5 dm. high, densely hirsute below, glabrate 

 above; leaves entire, the basal ones petioled, narrowly linear-spatulate, densely 

 sub-stellate; stem-leaves auriculate-clasping, linear; pedicels ascending; petals 

 purple or violet; pod arcuate-spreading; seeds in a single row, broadly winged. 

 Dry sandy soil: Ida. My. 



23. A. perennans S. Wats. Perennial, with a branching caudex, often 

 suffruticose at the base; stems 3-4 dm. high; lower leaves 2-3 cm. long, petioled; 

 spatulate or linear-spatulate, stellate; sepals stellate; petals 4-5 mm. long, pale; 

 pods 4-6 cm. long, arcuate, on spreading pedicels; seeds in one row. Dry plains 

 and valleys: Wash. Utah Ariz. -s Calif. Son. Submont. Ap-My. 



24. A. Lemmonii S. Wats. Stems 1-2 dm. high, ascending or erect; basal 

 leaves spatulate, 1-3 cm. long; stem-leaves lanceolate or oblong, sometimes 

 auricled; sepals stellate; petals rose or purple, 5-6 mm. long; pedicels 2-6 mm. 

 long, spreading; pods somewhat arcuate-spreading,. 3-4 cm. long, glabrous; 

 style obsolete. L. bracteolata Greene, a form with short stem-leaves. Moun- 

 tains: Mont. Utah Calif. B.C. Submont. Mont. Jl-Au. 



