44 | CRUCIFERZ. ARABIS, 
A. Breweri Watson Proc. Am. Acad. xi, 128. Stems several from a 
branching perennial caudex 4-12 inches high, more or less villous with 
spreading simple or branched hairs or stellate pubescent towards the base, 
lower leaves narrowly oblanceolate, entire or toothed, finely stellate-pub- 
escent, an inch long or less, the petioles often ciliate; upper cauline leayes 
lanceolate to narrowly oblong, sessile with a cordate base or obtusely au- 
riculate, somewhat villous or pubescent or nearly glabrous; flowers bright 
rose-color or purplish to nearly white, 3-4 lines long; the pedicels and pur- 
plish calyx more or less villous: pods at length spreading and more or less 
arcuate 144-8 inches long bya line or more broad, acute with a sessile 
stigma ; valves 1-nerved, veined: seeds orbicalar, narrowly winged. South- 
western Oregon to middle Ca:ifornia. 
A. Lemmoni Watson Proc. Am. Acad xxii, 467. Stems several from a 
branching perennial caudex, slender, 6 inches high or less, glabrous above, 
hoary below with fine dense stellate pubescence: lower leaves spatulate- 
oblanceolate, rarely with one or two teeth, 6-9 lines long, the petioles 
sometimes ciliate; cauline leaves oblong-lanceolate, auriculate, mostly gla- 
brous or nearly so: flowers 2-3 lines long, rose-colored; sepals pubescent : 
pods ascending or widely spreading, on short pedicels glabrous, curved 1- 
2 inches long by 34 of a line broad, more or less attenuated toa sessile 
stigma or short style: seeds in one row, orbicular, narrowly winged. In 
the mountains from northern California to Mount Adams Washington, 
Nevada, Wyoming, Montana and Brit. Columbia. | 
A. Koehleri (In honor of R. Koehler of the S. P. R. R., who has 
shown me many favors while botanizing in Oregon). Stems slender, 
8-6 inches high from a perennial much branched woody caudex; lower 
leaves densely rosulate at the ends of the branching caudex, persistent, 
linear-lanceolate to spatulate, narrowed below but scarcely pet- 
ioled, 6-12 lines long entire, canescent with stellate pubescence; cau- 
line leaves only one or two, broadly subulate, auriculate: racemes few- 
flowered; flowers scarlet 4-6 lines long: pods 2-3 inches long, a 
line broad, often arcuate, erect on slender pedicels; style very short or 
none: seeds small, narrowly winged. On cliffs, etc., in the Coast Mount- 
ains of Douglas county, Oregon and along the Umpqua river at Roseburg, 
flowering early. 
A. Lyallii Watson Proc. Am. Acad. xi, 122. Giabrous throughout or 
sometimes stellate-pubescent below: stems several or many from a 
branched perennial caudex, 2-10 inches high: lower leaves spatulate to 
‘linear-oblanceolate, usually 6-12 lines long, sometimes 2-3 inches long: 
the cauline narrowly lanceolate to oblong, sometimes scarcely ‘urinted: 
flowers rose-color, 2-3 lines long; sepals glabrous: pods erect or ascending, 
straight or nearly so, 1-2 inches long by 74-1 line broad, narrowed toa 
short style or sessile stigma; valves 1-nerved, at least to the middle, 
veined: seeds orbicular narrowly winged in 1 row. On the highest peaks 
of the Cascade Mountains from Brit. Columbia to California, Montana 
and Utah. 
A. microphylla Nutt.T. & G. Fl. i, 82. Stems slender, 2-6 inches 
high from a slender branching perennial caudex, somewhat hirsute at base 
with spreading hairs or nearly glabrate: lower leaves stellate pubescent, 
linear, acutish, 4-6 lines long; cauline leaves few, sessile linear-lanceolate 
to narrowly oblong: racemes few-flowered: flowers pale rose-color to pink, 
2-3 lines long: pods’ only 2-6 at the ends of the filiform branches, erect, 
1-2 inches long by %-34 of a line wide: seeds small, slightly winged. | 
Qn rocky banks, eastern Oregon to Wyoming and Utah. 
A. Cusickii Watson Proc..Am. Acad. xvii, 363, Villous-hirsute with 
scattered spreading mostly simple hairs. Stems usually several from a 
biennial (?) root, 6-10 inches high, simple hirsute or glabrate above: rad- 
ical leaves linear-oblanceolate, hirsute and ciliate, 8-12 lines long; the up- 
