RYDBERG: STUDIES ON THE Rocky MOouNTAIN FLORA 13 
at least it is more closely related to it than is C. denticulata Rydb., 
which Professor Nelson reduces to a variety. A ‘‘conservative’’ 
botanist would unite C. platyphylla Greene (C. runcinata hispi- 
dulosa Howell) and C. riparia. The latter would then be reduced 
to synonymy, as the form r name is three years older In Torrey 
and Gray’s Flora, Hieracium runcinatum was transferred to Crepis 
and the authors cite four specimens, of which two, viz., those 
collected by Drummond ( Crepis biennis 8 Hook.*) and by Nicollet 
-are preserved in the Torrey herbarium. These agree with the 
description of Torrey’s Hieracium runcinatum. I have adopted 
the name Crepis runcinata for these specimens rather than to 
transfer the name to C. riparia. If Professor Nelson had reduced 
C. tomentulosa to a synonym of C. glauca, I would have made no 
ob‘ection, for I myself am somewhat suspicious that it may be 
ony a state or condition of that species. Crepis petiolata and 
C. glauc lla are closely related to it, and the glandular involucre 
is the only character which would associate it with C. runcinata. 
C. perplexans is closer to C. runcinata, but it also is a glabrous 
plant. 
Both Crepis denticulata Rydb. and C. ied A. Nels. are 
included in C. riparia parva A. Nels. Crepis alpicola was tech- 
nically based on C. runcinata alpicola Rydb. The type of both 
the latter and C. denticulata are in the herbarium of the New York 
Botanical Garden and they are not at all alike. Nelson’s de- 
scription of C. riparia parva agrees with C. alpicola but not with 
C. denticulata. Compare the original descriptions. 
Crepis angustata Rydb. is made a synonym of C. gracilis 
(D. C. Eaton) Rydb. The plant described by Professor Nelson 
is, however, not C. gracilis but C. angustata. Crepis gracilis was 
‘established on C. occidentalis gracilis D. C. Eaton.t The type 
of this is Watson 716, a duplicate of which is in the Columbia 
University herbarium. It is a plant exceedingly like C. scopu- 
lorum in habit, but the involucre is narrower, the bracts fewer, 
and the achenes distinctly ribbed. Some of the involucral bracts 
have a few black hairs as they have in C. scopulorum. Crepis 
angustata, like C. intermedia, never has black hairs. C. gracilis 
* FI, Bor.-Am. 1: 297. 
} Bot. King. aa 203. 1871. 
