RYDBERG : STUDIES ON THE Rocky MountTAIN FLORA 15 
narrow leaves (narrower than in H. canadense) has sometimes 
been confounded with H. umbellatum, sometimes with H. cana- 
dense on account of its hairy stem. The common plant of the 
West, which has been confounded with both, is H. scabriusculum 
Schwein.* (H. macranthum Nutt.t). Narrower-leaved specimens 
have been named H. umbellatum and broader-leaved ones, H. 
canadense. It differs from H. canadense in the glabrous stem 
and finely scabrous-puberulent leaves. H. columbianum has long 
white or yellow hairs on the lower part of the stem. 
The true Hieracium Scouleri Hook. is not found in the region. 
A duplicate of the type is in the old Torrey herbarium. It is an 
almost scapose plant with the broad leaves obtuse at the apex 
and gathered near the base of the stem. The stem-leaves are 
few and small and the involucral bracts hirsute with short dark 
hairs. The plant resembles more Hieracium albiflorum in habit 
than it does H. griseum and H. cynoglossoides. The plant with 
long-hairy involucre which, mainly, Dr. Gray described in his 
Synoptical Flora and Professor Nelson described in the New 
Manual is not H. Scouleri. It should be known as H. albertianum 
Farr.{ 
Heteropleura Fendleri (Schultz Bip.) Rydb. comb. nov. 
Crepis ambigua A. Gray, Mem. Am. Acad. 4: 114. 1849. Not 
C. ambigua Balb. 1805. 
Hieracium Fendleri Schultz Bip. Bonplandia 9: 173. 1861. 
Heteropleura ambigua Schultz Bip. Flora 45: 435. 1862. 
Hieracium nigrocollinum S. Wats. Proc. Am. Acad. 25: 133. 
1890. 
This species has been included in Hieracium by Dr. Gray and 
others. It would be better to include it in Crepis than in Htera- 
cium, for the achenes are tapering upwards and the pappus is 
tawny, not white. The involucral bracts are not thickened on 
the back, however, as they are in most species of Crepis, and the 
general habit resembles perhaps more that of Hieracium than of 
Crepis. It does not fit well in either genus, at the same time 
*Long’s Second Exp. 2; 394. 1824. 
+ Trans. Am. Phil. Soc. II. 7: 446. 1841. 
tOttawa Nat. 20: 109. 1906. 
