166 CKUCIFER.E. Ambls. 



1 to 3 lines long; valves 1-nerved to the middle: seeds small, orbicular, winged, in 2 rows. — 

 Nutt. in Torr. & Gray, Fl. i. 83. A. puhertila, Nutt. 1. c. 82; Hook. Ic. t. 359.1— " Kocky 

 Mountains," and Blue Mountains, Oregon, Xuttall ; Camp Ilarucy, Oregon, 7\ Howell ,- near 

 Mt. Adams, 'Washington, Snlsdorf. 



++ ++ Pubescence stellately branclied, .scanty or wanting. 



A. sufltrutescens, Watsox. I'erennial, usually glabrous throughout : stems several from 

 a branching woody caudex, glabrous, a foot liigh : leaves glabrous or sometimes sparingly 

 stellate-pubesceut, narrowly oblanceolate ; the cauliue narrowly lanceolate, scarcely auricu- 

 late : flowers few, 3 lines long, purplish : pods pendulous on pedicels 4 to 6 lines long, 1^ to 

 2^ inches long by as many lines broad, more or less attenuate to a short tliick style ; valves 

 1-nerved, veined ; seeds in 2 rows, orbicular, winged. — I'roc. Am. Acad. xvii. 3G2. — Bluffs 

 of Snake Kiver, E. Oregon, C'usick ; Mt. Adams, Washington, Suksdor/, Howell; Siskiyou 

 Mountains, S. Oregon, Howell. 



•1— H— -I— Pods ascending, rarely widely spreading. 

 ++ (ilaucous, hoary below witii fine and dense stellate pubescence. 



A. Lemraoni, Watson. I'crennial, low (G inches high or less): stems several from a 

 branching caudex, slender, glabrous above : lower leaves spatulate-oblanceolate, rarely with 



1 or 2 teetli, 6 to 9 lines long ; the petiole sometimes ciliate ; the cauline leaves oblong- 

 lanceolate, mostly glabrous or nearly so : flowers 2 to 3 lines long, rose-colored : tiie sepals 

 pubescent: pods ascending or widely spreading, somewliat arcuate, 1 to 1| inches long by 

 two thirds line wide, on usually short pedicels (1 to 3 lines long), glabrous, more or less 

 attenuate above to a sessile stigma or short style; valves 1 -nerved to the middle or neai-ly 

 nerveless: seeds in one row, orbicular, uarrowly winged. — Proc. Am. Acad. xxii. 467. 

 A. canesce7is, & var. lalifolia, Wats. Bot. King Exp. 17. A. canescens, Brew. & Wats. Bot. 

 Calif, i. 32. ^1. canescens, & var. (?) s////osa, Wats. ibid. ii. 431. — In the mountains of 

 W. Wyoming, Parry, and Montana, Richardson, Watson, Canb//, to Brit. America at Bow 

 River Pass and Silver City, Macoun, westward to Mt. Adams, Wash., Suksdorf, and south- 

 ward to N. California, Lemmon, Mrs. Austin, and N. Nevada, Watson, 



++ ++ Pubescence stellate, scanty or wanting : green or scarcely glaucous. 



A. Drummondii, Gray. Biennial (or rarely perennial), slightly glaucous : stems erect, 

 one or several, a foot or two high: radical leaves narrowly oblanccoliitc, nidie or less 

 pubescent with malpighiaceous hairs (attached by the middle and u>ii;illv iMH-itudiually 

 appressed) ; the cauliue leaves oblong to linear-lanceolate, 1 to 2 intbes in hiigtli: petals 

 white or pinkish, 3 to 4 lines long, twice longer than the narrow sepals : pods erect when 

 mature, 1 to \^ lines broad, 1| to3 inches long, obtuse; the stigma sessile or nearly so; 

 valves 1-nerved, veined ; seeds broadly elliptical, winged, two thirds line wide. — Proc. Am. 

 Acad. vi. 187. 1 A. Breutelii, Lange, Medd. Green, iii. 81 (only once collected and without 

 fruit). Turritis stricta, Grab. Edinb. New Phil. Jour. 1829, 3.50. Streptanthus angiisti- 

 folius, Nutt. in Torr. & Gray, Fl. i. 76. — Rocky Mountains from Brit. America to N. Utah ; 

 Cypress Hills, Canada, Macoun; E. Humboldt Mts., Nevada, Watson; Mono Pass, Calif., 

 Breiver, no. 1729. 



A. Lyallii, Watson. Perennial, low (rarely a foot high), glabrous tliroughout or some- 

 times more or less stellate-pubescent below : stems several or many from a branched caudex : 

 lower leaves spatulate to linear-oblanceolate, usually one half to one inch long, sometimes 



2 to 3 inches long ; the cauline narrowly lanceolate to oblong, sometimes scarcely auricled : 

 flowers ro.se-color, 2 to 3 lines long : sepals glabrous : pods erect or ascending, straight or 

 nearly so, 1 to 2 inches long by two thirds to one line broad, narrowed to a short style or 

 se.«sile stigma; valves 1-nerved, at least to the middle, veined : seeds orbicular, narrowly 

 winged, usually in 1 row. — Proc. Am. Acad. xi. 122. A. Drummondii, & var. alpina, 

 Wats. Bot. King Exp. 17, in part. — Fre(|uent in the mountains, often alpine or subalpine, 

 from Brit. America, Liiall, Macoun; W. Montana, Canby, and N. Utah, Jones, to the Sierra 

 Nevada, Mono Co , Calif., Brewer, Shockley, and the Cascade Mts. of Oregon and Washington. 



1 Add syn. A. pauciflonim, Nutt. in herb. (Pliilad. Acad. Sci.), wbicOi is with scarcely a doubt 

 Nuttall's Sisymbrium pauciflonim, described in Torr. k Gray, Fl. i. 93 (notwithstanding the character 

 " not cauesceut "), a species otherwise wholly ob.scure. 



