241 Rydberg : Studies ox the Rocky Mountain Flora 



British Columbia: Summit of Rocky Mountains, \?,go, Jolui 

 Macoiin (type in herb. Columbia University). 



Draba Parryi sp. nov. 



Annual, perfectly glabrous, except a few cilia on the petioles : 

 stems several, usually less than i dm. high, scapiform or rarely 

 with a stem leaf: basal leaves numerous, linear or narrowly linear- 

 oblanceolate, 1.5-2.5 cm. long; pedicels spreading, in fruit 5-8 

 mm. long : flowers small ; petals scarcely 2 mm. long, white or 

 light yellow : pods erect, oblong, 5-8 mm. long, 1.5-2 mm. wide, 

 glabrous : style obsolete. 



This is closely related to D. crassifolia but the latter has 

 broader leaves, which are more or less hirsute on the surface and 

 distinctly ciliate on the margins. 



Colorado : Foot of Gray Peak, 1872, E. L. Greene (type in 

 herb. Columbia University); 1872, C. C. Parry; Cameron Pass, 

 1896, C. F. Baker. 



Wyoming : Telephone Mines, 1900, Aven Nelson, jSyg. 



Draba cana sp. nov. 



Perennial with a taproot and short cespitose caudex, whole 

 plant densely grayish stellate ; stem 1-2 dm. high, often branched : 

 basal leaves numerous, oblanceolate or spatulate, 1-1.5 cm. long, 

 entire or minutely but sharply toothed, densely stellate ; stem 

 leaves lanceolate to ovate, about i cm. long : racemes many-flow- 

 ered ; pedicels short, nearly erect, in fruit 2-3 mm. long : flowers 

 small ; petals white, about 3 mm. long : pod Hnear-oblong, 6-8 

 mm. long, densely pubescent : style about 5 mm. long. 



This has gone under the name of D. incana, but the latter is 

 much less densely stellate and has a glabrous, much broader pod. 

 I have seen only one specimen of true D. incana from this conti- 

 nent, and it was collected in Labrador. Most of those under this 

 name belong to D. cana, which ranges from Labrador to the 

 Yukon Territory, south in the mountains to Colorado. The fol- 

 lowing is regarded as the type. 



Alberta : Morley, foothills of the Rocky Mountains, 1887, 

 John Macoun (herb. Columbia University). 



Draba McCallae sp. nov. 



Perennial with a cespitose base, whole plant sparingly stellate 

 but green : stems several, simple, about 3 dm. high : basal leaves 



