Streptanthus. CRUCIFERiE. 167 



A. microphylla, Nutt. Perennial: slender stems several from a slender braucliing 

 caudex about 6 inches high, somewhat hirsute with spreading hairs at base or very nearly 

 glabrate : lower leaves stellate-pubescent ; petioles often ciliate, linear to narrowly oblanceo- 

 late, an inch long or less ; cauline few, linear-lanceolate to narrowly oblong : flowers pale 

 rose : sepals slightly pubescent or glabrous : pods usually very narrow, 1 to 2 inches long by 

 one half to three fourths line broad, erect or somewhat spreading ; valves slightly nerved 

 toward the base ; seeds small, in one row, slightly winged. — Nutt. in Torr. & Gray, Fl. i. 82. 

 — Uinta Mts., Utah, Watson; Yellowstone Park, Wyoming, Parry, Canby ; Blue Mts., 

 Oregon, Cusick, Howell. 



* * * Leaves all entire, not cordate nor auriculate. 



■i— Pods ascending. 

 •H- Glabrous, the petioles only sparingly ciliate, perennial. 

 A. Howellii, "Watson. Stems low (1 to 4 inches high), from a much branched cespitose 

 caudex : leaves all narrowly oblanceolate, glaucous, inch long or less, acute or obtuse ; the 

 cauline somewhat drooping: flowers pale or bright pink: pods erect, 1^ inches long by 2 

 lines broad, acuminate ; the stigma sessile ; valves nearly nerveless ; seeds orbicular, broadly 

 winged. — Proc. Am. Acad. xxv. 124. — Ashland Butte, Siskiyou Mts., S. Oregon, T. Howell, 

 1887; White Mts., Mono Co., Calif., at 11,000 feet alt., ShocUey, August, 1888. 



•H- ++ Villous-hirsute with scattered spreading mostly simple hairs. 



A. Cusickii, Watson. Stems usually several from a biennial root, a span high or less, 

 simple, hirsute or glabrate above : radical leaves linear-oblanceolate, hirsute and ciliate, 

 1 inch long or less ; cauline linear to linear-oblong, sessile, not auriculate : flowers rose- 

 colored, 3 to 5 lines long : sepals villous : pods arcuate-ascending, glabrous, 2 to 3 inches 

 long by IJ- lines broad, obtusish ; stigma sessile; valves 1-nerved below the middle; seeds 

 orbicular, winged, in 1 row. — Proc. Am. Acad. xvii. 363. — Blue Mts., Oregon, Cusick; 

 Cascade Mts. of Oregon and Washington, Hoivell, Brandegee.^ 

 ++++++ Finely stellate-pubescent. 



A. Parishii, Watson. Low and cespitose (2 to 4 inches high), very finely stellate-pubes- 

 cent throughout, the simple slender stems from a much branched rootstock : radical leaves 

 numerous, linear-oblanceolate, half inch long or less, entire ; the cauline few, linear, sessile : 

 petals rose-color, 3 to 4 lines long, twice longer than the purplish sepals : pods glabrous, 

 ascending on pedicels 2 to 3 lines long, an inch long including the filiform style (2 to 3 lines 

 long), a line broad, attenuate above; valves 1-nerved and veined: seeds somewhat in 2 rows, 

 elliptical, narrowly winged. — Proc. Am. Acad. xxii. 468. — Bear Valley, San Bernardino 

 Mts., Calif., at 6,500 feet alt., S. B. Parish. 



-i— H— Pods pendulous : finely stellate-pubescent. 

 A. pulchra, Jones. Canescent throughout with a fine stellate pubescence : stems erect 

 from a branching woody rootstock, a foot high, leafy : leaves not rosnlate at base ; the lower 

 narrowly oblanceolate and petiolate, 1 to 2 inches long ; the upper linear-lanceolate, sessile : 

 flowers usually large, soon spreading or reflexed : petals 3 to 6 lines long, rose-colored, 

 usually twice longer than the pubescent sepals: pods pendent, finely pubescent, 1^ to 2-J 

 inches long by 1^ lines wide on pedicels three fourths line long; stigma sessile; valves 

 1-nerved, veined: seeds small, in 2 rows, orbicular, winged. — Jones in Wats. Proc. Am. 

 Acad. xxii. 468. — Borders of the desert, W. Nevada, Stretch, Shockley, Jones; to San 

 Bernardino and San Diego Counties, Calif., Vasey, Parish Bros., W. G. Wright. 



45. STREPTANTHUS, Nutt. (SrpeTrTos, twisted, and ^,/^o?, flower, 

 from the twisting of the petals.) — Caulescent branching often glaucous annuals 

 or biennials of the Pacific Coast and drier interior region to the Lower Missis- 

 sippi ; with entire or toothed (rarely pinnatifid) usually sagittate and clasi^ing 

 leaves and purple to white (rarely yellowish) flowers- — Jour. Acad. Philad. v. 

 134; Gray, Gen. 111. i. 145, & Proc. Am. Acad. vi. 182; Brew. & Wats. Bet. 

 Calif, i. 33. [By S. Watson.] 



1 Also in Spokane Co., Wasliington, Suksdoif. 



