Rydberg : Studies on the Rocky Mountain Flora 513 



H. niacraiitliniii ranges from Wyoming and Washington north- 

 ward to subarctic America. It apparently also extends eastward 

 to the upper Mississippi River (Nicollet's specimens seem to be- 

 long here) and therefore may be Schweinitz' H. scabcrrimimi, 

 which has been referred to H. lunbcllatuni and H. Caiindciisc. I 

 have not seen Schweinitz' original description and can not venture 

 an opinion. Nuttall's name belongs to the plant without any 

 doubt. 



Hieracium Columbianum sp. nov. 



Perennial. Stem about 6 dm. high, terete, more or less tinged 

 with purple, more or less white- or yellowish-hirsute below, gla- 

 brous or puberulent above : lower leaves oblanceolate, 8—10 cm. 

 long, light green and somewhat glaucous beneath, usually more 

 or less silky-hirsute, sinuately dentate, acute ; the middle leaves 

 lanceolate or ovate-lanceolate with rounded or obtuse base, sessile, 

 more glabrate ; the uppermost much reduced and bract-like : in- 

 florescence corymbose-cymose, small and contracted : heads 2—6, 

 12—15 rnm. high : bracts lanceolate, unequal and more or less im- 

 bricated, dark, puberulent when young, glabrous in age : pappus 

 very light brownish. 



This species is nearly related to H. Cmiadciisc and H. undnl- 

 latiiui, but differs from both in the long hairs of the lower part of 

 the plant. The leaves are thin as in //. Caiiadcusc but narrower 

 and the heads are fewer. It grows in low ground at an altitude 

 of about 600 m. 



Idaho: Priest River Valley, 1900, D. T. MacDongal, log 

 (type); canons near Farmington Landing, 1892, Sandbcrg, Mac- 

 Doug al & Heller, jjj. 



