RvDRERG : Studies ox the R(ickv Mountain Flora 513 



//. iiiacranthuin 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' //. scabcrrimniii, 

 which has been referred to H. iiinbcllatuiii and //. Canadcnsc. I 

 have not seen Schweinitz' original description and can not venture 

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



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— lo 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-C)'mose, small and contracted : heads 2—6, 

 12—15 nim. 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. Canadeiisc and H. iivibcl- 

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

 the plant. The leaves are thin as in H. Canadcnsc 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. MacDoiigal, log 

 (type); cafions near Farmington Landing, \Z<^2, Sandberg, Mac- 

 Doug al & Heller, jjj. 



