192 BOTANICAL GAZETTE -[sepreven 
Arabis pendulocarpa.—Perennial (probably short-lived), a 
short, simple or branching, woody caudex surmounting a slender 
_ taproot: stems I-3, only one from each crown, simple, ascending, : 
rather weak, about 2 high, nearly glabrous except at the base 
eee 
the remains of those of former years, closely and finely stellate 
pubescent, narrowly oblong to elliptic, tapering into a short pe- — 
iole ; the stem-leaves crowded toward the base, linear-oblong, 4 
sessile, not auriculate, 5—10o™™ long, usually longer than those of 
the crowns: flowers few, small, nearly erect at anthesis but the 
siliques soon pendent: pedicels 6-8™ long, glabrous or neatly 
so: petals white or tinged “with purple, about 5™™ long, dis 
tinctly longer than the sparsely hairy sepals: pods 4-6™ long, 
about 2™ wide; the seeds narrowly wing-margined. 
The key of the Synoptical Fhra throws this into close proximity to 4. 
Pulchra Jones, but it is probably more nearly allied to A. Hodboellii Homen 
t occurs among the rocks on exposed or partly wooded hilltops. page ve 
twice, only in Yellowstone park: no. 5504, Madison river, June 23,,1899; : 
no. 5728, Yellowstone river near Junction butte, July 9, 1899. : , : 
Arabis elegans.— A tall biennial from a vertical tap 10h — 
6-10 high: stem simple and strict (rarely a branch a 
from the base), a pubescence of branched hairs below, becoming 
glabrate upward, leafy up to the inflorescence : leaves cro 
on the lower part of the stem but not rosulate at the > 
mostly entire, more rarely some of them remotely em” 
finely pubescent or the uppermost almost glabrous; the: 
oblanceolate, petioled, passing into the oblong-lineat,, ; 
auriculate ones of the middle stem ; the uppel oa 
smaller, linear, Sagittate-clasping : raceme either few- bio 
ere 
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