Ae” 
att 
Rocky MounTAIn FLora 251 
, Draba sobolifera sp. nov. 
A low cespitose perennial, but the leafy stolons often some-: 
what elongated: basal leaves oblanceolate, obtuse or spatulate, 
I-2 cm, long and 3-4 mm. wide, sparingly stellate-villous, thick 
with indistinct midrib: peduncles 3-6 cm. long, stout, rather 
many-flowered: petals yellow, obovate, about 4 mm. long, more 
than twice as long as the rounded sepals: pedicels in fruit 7-8 
mm. long: pod ovate, about 6 mm. long, 3-4 mm. wide, finely 
stellate: style about 5 mm. long. 
This species is related to D. ventrosa and D. alpina. From 
the former it differs in the longer leaves and the finer and sparser 
pubescence ; from the latter in the more elongated stems, the 
shorter and stellate pod and the shorter styles. It grows at an 
altitude of about 2500 m. 
Uran: Marysvale, above tivaiuer line, 1894, Marcus E. Jones, 
936 (type), 5893e and 5893az (all in U. S. Nat. Herb.). 
4 
’Draba argyrea sp. nov. 
A cespitose tufted perennial, with underground horizontal 
stems; basal leaves obovate, 3-7 mm. long, in dense rosettes, 
densely and finely stellate, almost silvery ; midvein indistinct : pe- 
duncles slender, 3—5 cm. long, naked, few-flowered : petals yellow, 
3mm. long, obovate, about twice as long as the ovate sepals : pedi- 
cels in fruit 5-8 mm. long: pods lanceolate, 6-7 mm. long, 2.5— 
3 mm. wide, minutely stellate: style about 1 mm. long. 
This species resembles somewhat D. oligosperma in general 
habit and flowers, but the leaves are shorter and broader, more 
decidedly stellate and without the strong midrib, and the pod is 
longer. It also reminds one of D. ventrosa but is a more delicate 
plant with finer pubescence and longer pods. The type grew at an 
altitude of about 3000 m. 
IpaHo: Rock crevices, Sawtooth Mountains, head of Pettit 
Lake, July, 1895, L. #. Henderson, 3538 (type in U. S. Nat. 
Herb.). 
~ Draba uncinalis sp. nov. 
Small cespitose and pulvinate perennial : flowering stems scapi- 
form, 2-3 cm. high, sparingly stellate, leafless ; basal leaves in 
dense tufts, thick, rounded obovate, 3-4 mm. long, sparingly stellate, 
with indistinct midrib: inflorescence corymbiform, few-flowered ; 
pedicels in fruit 4-5 mm. long: pod ovate, 3-4 mm. long and 3 
mm. wide, glabrous or nearly so: style about 0.5 mm. long. 
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