54 : | CRUCIFERZ. DRABA. 
an annual root, leafy. radical leaves ovate to ovate-oblong, petioled, 5-7 
lines long; upper ones oblong-lanceolate to linear; racemes many-flowered, 
strict, elongated in fruit: petals obovate, very slightly emarginate: pods nar- 
rowly oblong, glabrous, 1-2 lines long, about the length of the pedicels; 
valves marked witha median nerve and obscursly veined; cells 4-6-seeded. 
Wet places. Willamette Valley (near Coburg) Oregon, and Missouri to 
Virginia, Louisiana and Georgia. 
** * High mountain and northern species with entire or few- 
toothed leaves and small yellow flowers. Stigma sessile. 
D. nemorosa, L. sp. ii, 648. Pubescent with white branching hairs: 
stem slender, 4-8 inches high, branching from near the base, leafy: 
leaves ovate to lanceolate, sparsely toothed: petals emarginate small, yellow: 
pods narrowly oblong, hzif the length of the spreading pedicels, minutely 
pubescent. On moist grassy slopes, Oregon to the Arctic Circle and the 
Great Lakes, 
D. lutea, Gilib. Fl. Lithuana, iv, 46. D. nemorosa var. leiocarpa Lindb. 
Sparingly hirsute: stems very slender, often nearly or quite leafless: pedicels 
coarsely exceeding or even shorter than the glabrous pods, In moist places 
snd river banks, valley of the Columbia, 
D. stenoloba, Ledeb. Fl. Ross. i. 152. Stems slender, simple, or branch- 
ing below, villous towards the base: leaves mostly subrosulate, oblong-lan- 
ceolate or oblanceolate, mostly entire, ustially more or less villous and ciliate : 
pods linear, acute, glabrous, 4-7 lines long, equaling or exceeding the 
spreading pedicels. Subalpine, from the Sierra Nevadas te Colorado and 
Oregon, and northwestward to Unalaska. 
§ 3 Draspma Lindb. Linnea xiii, 318. Perennials with bran- 
ching leafy-tufted caudex, and soft flat not carinate leaves. 
* Scapose. Leaves entire, less than 6 lines long. Flowers yellow. 
D. Howellii, Watson, Proc. Am. Acad. xx, 354. Minutely stellate-pu- 
bescent throughout: loosely cespitose: scapose stems about 3 inches high: 
leaves rosulate, broadly spatulat,e entire or rarely obtusely toothed; 3-5 
lines long: petals oblanceolate, obtuse, 3-4 lines long, much exceeding the 
oval yellow sepals: pods pubescent, oblong, acute, 3-4 lines long. beaked 
with the sender style. On highrocky ridges of the Siskiyou Mountains 
near Preston peak, . 
D. Lemmoni Watson, Bot. Cal. ii, 480. Leaves crowded at the sum- 
mit of the stout branched caudex, broadly oblanceolate, obtuse or obtusish, 
2 to 4 lines long with long branching hairs on the margins and loosely scat- 
tered over the surface: scapes and corymbed pedicels pubescent with 
spreading hairs: flowers nearly 2 lines long: pods ovate-lanceolate, beaked 
with a very short thick style, sparingly hairy, 3 lines long, rather exceeding 
the pedicels. Peaks of the Sierra Nevadas to the Wallowa Mountains in 
eastern Oregon. 
D. ventosa, Gray, Am. Nat. viii, 212. Cespitose, the slender branches 
of the caudex more or less densely leafy: leaves oblong-lanceolate, obtuse 
or acutish, densely stellate-pubescent or glabrate: petals 1-3 lines long, 
much exceeding the broad obtuse stellate-pubescent or glabrate sepals: 
pods ovate to oblong-lanceolate, densely pubescent or glabrate, on ascending 
pedicels: style short and slender, Stein Mountain southeastern Oregon to 
northwestern Wyoming, Utah and Nevada. 
* * Scapes rarely witha single leaf: leaves entireor rarely few- 
toothed: flowers white. 
D. levipes DO, Syst. ii, 346. Caudex with numerous slender matted 
