| ARABIS. CRUCIFER&. 43 
mouth of the St. Lawrence and Virginia. Eu. & Asia. 
A. fureata Watson Proc. Am. Acad. xvii, 362. Stems several from a 
slender branching perennial ‘rootstock, slender ascending, 10-18 inches 
high: lower leaves oblong-ovate, attenuate below toa stout petiole, few- 
toothed, 1-3 inches long; sparingly pubescent and ciliate with coarse 
forked hairs; cauline oblong to linear or lanceolate, scarcely auricled : flow- 
ers largein a lax few-flowered raceme; petals white broadly spatulate, 
6-7 lines long, more than twice as long as the sparingly hirsute sepals: 
pods 10-20 lines long, less than a line broad, attenuate to avery short 
style, on slender pedicels 6-10 lines long: seeds oblong-elliptical, winged 
at the lower end. On bluffs of the Columbia river fromthe mouth of the 
Sandy to near Hood river. 
A. Suksdorfii. A. furcata Watson I. c. in part. Stems tufted from a 
thick perennial root, simple, 3-8 inches high, strictly erect, lower leaves 
oblong-oboyate 1-3 inches long, sparingly pubescent and ciliate with 
branched hairs, entire or few-toothed; cauline few, oblong to lanceolate: 
flowers middle-sized, in a strict somewhat dense raceme: petals white, 
spatulate 3-5 lines long: pods 6-18 lines long by less than a line broad, 
erect on short erect pedicels. On dry alluvial ridges Mount Adams Wash- 
ington near the line of perpetual snow. 
A. purpurascens Howell in Herb. Greene Pitt. i, 161. Usually livid- 
purple throughout: stems tufted, from a branching perennial root, simple, 
usually slender, 6-30 inches high, soft-pubescent with simple or forked 
hairs and a shorter, more branching pubescence beneath: leaves scattered 
but rather ample, thin sparsely pubescent: the lowest obovate-oblong at- 
tenuate below toa petiole, the cauline narrowly-oblong sessile, all with 
scattered coarse and salient teeth: racemes loose and few-flowered ; calyx 
purple 2-3 lines long: petals 6-9 lines long deep rose purple: pods slender, 
2 inches long less than a line wide. On rocky ridges and bluffs, northern 
base of the Siskiyou Mountains from Ashland to Waldo Oregon. 
A. atrorubens Suksdorfin Herb. Greene Eryth. i, 223. Pale and 
glaucescent or the herbage becoming purplish in full maturity: stems 
erect, a foot or more high from a branching perennial root: radical leaves 
spatulate-oblong, an inch long, stellate-pubescent ; cauline ones glabrous, 
ovate to ovate-lanceolate, sessile and auriculate-ciasping, all rather re- 
motely and coarsely serrate-toothed: raceme simple, strict, few-flowered : 
sepals dark red, sparsely pubescent with branching hairs: petals dark red 
or almost black about 4 lines long: pods suberect narrowly linear, acute, 3 
inches long or more: seeds flattened, narrowly winged. Edge of brush- 
lands on the higher part of the Klickitat hills, Klickitat county, Wash- 
ington. ui 
A. sparsiflora Nutt. T. & G. Fl. i, 81. Stems 1-3 feet high from a bi- 
ennial or perennial root, sparingly pubescent below with forked or simple 
hairs: lower leaves numerous, entire oblanceolate, on slender petioles; 
cauline leaves oblong to linear-lanceolate, entire, sessile and clasping by 
the auricled base, acute: racemes rather few-flowered ; flowers small ; pet- 
als linear-oblong, bright purple, twice as long as the often colored sepals: 
pods 2-3 inches long, spreading or suberect on spreading pedicels: seeds 
narrowly winged. On dry plains, eastern Oregon and Washington to the 
Rocky Mountains and northern Nevada. 
A. Bolanderi Watson Proc. Am. Acad. xxii, 467.. More or less pubes- 
cent throughout with soft stellate hairs: stem solitary, much branched, 1- 
' 2 feet high from a biennial root: radical leaves not known; catline lanceo- 
late, 1-2 inches long, auriculate-clasping entire: flowers small 2-3 lines 
long, rose-colored: sepals and pedicels pubescent: pods mostly diva 1 «& 
spreading, glabrous, straight, 6-18 lines long obtuse with a broad  i« 
stigma: valves l-nerved to the middle: seeds. orbicular to elliptic a 
rowly winged. Yosemite Valley, Bolander; Washington, Brandegee. 
