Studies on the Rocky Mountain flora — XII. 
Per AXEL RYDBERG 
* Draba coloradensis sp. nov. 
Annual, leafy below, often branched, 5-10 cm. high; leaves 
obovate, entire, 1—2 cm. long, 0.5—1 cm. wide, subsessile, coarsely 
hirsute, hairs often branched but not truly stellate ; peduncles 
5 cm. or in fruit often 10 cm. long; raceme short and corymbi- 
form at first, more elongated in fruit ; sepals oval or oblong, ob- 
tuse, I.5—1.75 mm. long ; petals white, 3-3.5 mm. long, spatulate, 
emarginate ; fruiting pedicels 4—5 cm. long, divergent ; pods linear- 
oblong, 10-12 mm. long and nearly 2 mm. wide, hirsute; style 
none, 
This species belongs to the D. caroliniana group. From that 
Species it differs in the hirsute pods, stouter habit and larger 
leaves; from D. micrantha in the large petals, the larger leaves 
and the more elongated raceme in fruit; and from D. cuneifolia in 
the entire leaves and the larger pods. It grows on river flats, dry 
hills and plains at an altitude of about 1500 m. 
Cotorapo’: Fort Collins, river flats, lower Armstrong, 1897, 
collector not given (type) ; plains near Denver, 1870, £. L.Greene ; 
Mancos, 1891, Alice Eastwood. 
v Draba streptocarpa Grayana var. nov. 
Low and densely cespitose, almost pulvinate ; flowering stems 
'—3 cm. high, almost scapose ; stem-leaves few and reduced ; even 
the basal leaves much smaller than in the type. 
It grows at an altitude of 3600-4000 m. 
CoLorapo: Gray’s Peak, Aug. 1895, P. A. Rydberg (type) ; 
same locality, 1892, C. S. Crandall 31; mountain west of Como, 
1895, Crandall & Cowan 41. 
~ Smelowskia lineariloba sp. nov. 
Densely cespitose ; caudex densely covered by the bases of 
the dead leaves; leaves 2-3 cm. long, pinnately divided to the 
midrib into linear acute divisions, finely stellate and the petioles 
Ciliate ; stems about 1 cm. high, few-leaved ; inflorescence at first 
, 
DDD 
