Arabls. CRUCIFER^. 165 



A. perennans, Watson. Terennial, with a usually branching and somewhat woody base, 

 about a foot high, roughly stellate-pubescent, sometimes glabrous above : lower leaves an 

 inch long or less, broadly spatulate to narrowly oblanceolate ; the petioles sometimes ciliate . 

 flowers smaller (2 to 3 lines long), often pale : pods 1 to 2 inches long by a line wide or some- 

 what less ; the small stigma sessile : calyx and pedicels stellate-pubescent to glabrous : 

 seeds orbicular, very narrowly margined. — Proc. Am. Acad. xxii. 467. A. arcuata & 

 A. retrofracta, Wats. Bot. King Exp. 18, in part. Turritis patula, Gray, Bot. Ives Rep. 6. 

 Distributed by Pringle under the name A. Holboellii, yar. per etmans. — N. Nevada and Utah 

 to Arizona, and the Colorado and Mohave Deserts, California. 



A. SUbpinnatifida, Watson. Very finely stellate-pubescent throughout : stems one or 

 more from a biennial or sometimes perennial (?) root, a span to a foot high, rarely branched : 

 leaves very densely and finely pubescent; the lower linear- or narrow-oblanceolate, entire 

 or toothed, 1 to 2 inches long ; the cauline lanceolate, more or less unequally incised or the 

 uppermost entire : flowers rose-colored, 3 to 6 lines long : pods pubescent, slightly curved, 

 1 J to 2^ inches long by 1 to 1^ lines broad, attenuate to a short style, and pendent upon 

 recurved pubescent pedicels (2 to .5 lines long) ; valves 1-nerved to the middle and veined; 

 seeds in 1 row, as broad as the partition, winged. — Proc. Am. Acad. xx. 3.53. — N. W. 

 Nevada, Torreij, Watson, no. 76, in part; Siskiyou Mountains, California, Greene; S. W. 

 Oregon, T. Hoivell. 



* * Cauline leaves auriculate-clasping, entire ; the radical also entire or (in A. Breweri, 

 A. Lyallii, and A. Beckwithli) obsoletely denticulate (in A. Bolanderi, as yet unknown). 



■h- Pods arcuate-spreading or divaricate. 

 A. Bolanderi, Watson. Biennial, more or less pubescent throughout with soft stellate 

 hairs : the solitary stem much branched, 1 to 2 feet high : radical leaves not known ; cauline 

 lanceolate, 1 to 2 inches long : flowers small (2 to 3 lines long), rose-colored : sepals and 

 pedicels (in fruit, 1 to 2 lines long) pubescent: pods mostly divaricately spreading, glabrous, 

 straight, 6 to 18 lines long, obtuse with a broad sessile stigma; valves 1-uerved to the 

 middle ; seeds orbicular to elliptical, narrowly winged, somewhat in two rows. — Proc. Am. 

 Acad. xxii. 467. — Yosemite Valley, Bolander ; Washington, Brandegee. Also collected by 

 Torrey, a more glabrous form, probably in the mountains of California, though ticketed in 

 his herbarium from Colorado. 



A. Breweri, Watson. Perennial: stems several from a branching rootstock, 4 inches to a 

 foot high, more or less villous with spreading simple or branched liairs or stellate-pubescent 

 toward the base : lower leaves narrowly oblanceolate, entire or toothed, finely stellate-pubes- 

 cent, an inch long or less ; the petioles often ciliate ; upper cauline leaves lanceolate to 

 narrowly oblong, sessile with a subcordate base or obtusely auriculate, somcM-hat villous or 

 pubescent or nearly glabrous : flowers bright rose-color or purplish to nearly white, 3 to 4 

 lines long ; the pedicels and purplish calyx more or less villous : pods at length spreading 

 and more or less arcuate, 1^ to 3 inches long by a line or more broad, acute with a sessile 

 stigma; valves 1-nerved, veined; seeds orbicular, narrowly winged. — Proc. Am. Acad. xi. 

 123; Brew. & Wats. Bot. Calif, i. 33. — From Mt. Diablo i and Lassen's Butte, California, 

 to Waldo Co., Oregon. 



A. Beckwlthii, Watson. Resembling A. subpinnatifida, hoary with a fine dense stellate 

 jjuliescence : stem erect from a biennial root, a span high : leaves entire ; the radical oblan- 

 ceolate, an inch long; the cauline lanceolate: pods glabrous (or slightly pubescent when 

 young), spreading and arcuate, 2i inches long; seeds mostly in 2 rows. — Proc. Am. Acad, 

 xxii. 467. — N. Nevada, Quartz Mountains, Bechrith, near Carson City, Watson, near 

 Candelaria, Shackle y ; California, vSan Bernardino Mountains, Parish Bros. 



•i— -i— Pods reflexed. 

 ++ Pubescence densely and finely stellate. 



A. canescens, Nutt. Low (4 to S inches), biennial or perennial, finely stellate-pubescent 

 throughout, stems one or several: lower leaves linear-oblanceolate, an inch long or less; 

 cauline leaves linear, sliglitly auriculate : flowers small, 2 lines long or less, pale : pods pen- 

 dulous, pubescent or glabrate, 1 to 1^ inches long by two thirds line broad, on pedicels 



1 Southward to Mt. Hamilton, ace. to Greene, FI. Francis. 254, & Erythea, i. 87. 



