De 8 nd ee ee 7 . 
-ARABIS. CRUCIFERE. 45 
per ones linear-oblong and clasping but not auriculate, all entire or spar- 
ingly toothed: petals white with purple veins, linear spatulate, about 3 
lines long, twice as long as the sparingly pubescent sepals and exceeding 
the pedicels: pods ascending, faleate 2-3 inches long by a line, broad 
acuminate, stigma sessile: seeds acutely margined. On_ high rocky 
ridges, Klickitat county to Spokane county, Washington and Union 
county Oregon. 
A. platysperma Gray Proc. Am. Acad. vi, 519. Glaucous, sometimes 
wholly glabrous: stems erect or ascending froma branching perennial root- 
stock, 2-12 inches high, simple or branched: lower leaves oblanceolate, 
about an inch long; the upper oblong to linear-lanceolate, sessile: petals 
rose-colored or nearly white 2-3 lines long: pods erect or a little spreading, 
1-2'6 inches long by 144-24 lines wide, attenuate to a short stout style; 
valves distinctly veined, l1-nerved toward the base: seeds orbicular, 
broadly winged. From Mount Hood Oregon to the San Bernardino and 
Sierra Nevada Mountains. 
A. Howellii Watson Proc. Am. Acad. xxv, 124. Glabrous; stems 1-4 
inches high from a much-branched cespitose caudex: lower leaves glau- 
caus, entire, linear-oblanceolate, an inch long, often sparsely ciliate tow- 
ards the base; the few cauline narrowly oblong obtusish, sessile some- 
what clasping but not auriculate at base: flowers few, pale to bright pink, 
3-4 lines long: pods erect 1-2 inches long by 2 lines broad acuminate; 
stigma sessile: seeds orbicular, broadly winged. On Ashland Butte, Sis- 
kiyou Mountains, Oregon. 
§ 4 Penputa Flowers nodding, usually pale. Pods usually 
pendulous. Seeds in 1-2 rows in the cells. 
A. suffruteseens Watson Proc. Am. Acad. xvii, 362. Glabrous 
throughout or sparingly stellate pubescent below: stems several from a 
branching woody perennial caudex, 8-12 inches high: lower leaves nar- 
rowly oblanceolate, acute, about an inch long: the cauline more oblong 
and sessile or shortly auriculate-clasping: racemes few-flowered; sepals 
purple, 3 lines long: pods 1-24% inches long by 144-2 lines wide, attenuate 
to a short style, straight, pendant, on reflexed pedicels 4-6 lines long: seeds 
orbicular winged. On dry rocky ridges, Mount Adams Washington to the 
bluffs of Snake river in Oregon and the Siskiyou Mountains near the 
northern line of California.. 
A. retrofracta Graham Edinb. New Phil. Journ. 1829, 344. Stems 
erect from a biennial root, 1-3 feet high, simple or branching above, gla- 
brous and often somewhat glaucous above, minutely pubescent below with 
reflexed simple or forked hairs: leaves narrowly lanceolate to linear, the 
lower ones attenuate below to a winged petiole, rather coarsely serrate- 
dentate, an inch or two long, densely pubescent with stellate hairs; the 
upper ones linear, sessile deeply sagittate entire 144-3 inches long: ra- 
cemes few to many-flowered ; flowers nodding on spreading tomentose ped- 
icels: petals spatulate, pale to bright purple, 3-4 lines long, twice as long 
as the pubescent calyx : pods linear, 2-3 inches long by half a line wide and 
with the pedicels strongly refracted: seeds obovate, narrowly winged, 
along streams, eastern Oregon and Weshington to the Rocky Mountains: 
and Brit. Columbia. 
A. secunda Howell Eryth. iii, 33. Stems severa! from a branching 
woody base 10-18 inches high, stellate-pubescent: lower leaves lanceolate, 
about an inch long, narrowed below to a winged petiole, entire, acute; cau- 
line leaves linear, revolute, sessile, distinctly auricled 6-12 lines long: ra- 
cemes many-flowered, strictly secund: pods 1-2 inches long, less than a 
line wide on filiform pedicels 2-3 lines long that are all deflexed one way 
forming a secund spike; seeds small, narrowly winged, in 1 row. On 
dry ridges Mount Adams, Washington. 
