466 Rypsperc: Rocky MOUNTAIN FLORA 
has narrower divisions to the stem-leaves, and has hispidulous 
instead of glabrous achenes. 
Under Senecio cymbalarioides Nutt., in’ the New Manual is 
given the following: ‘(S. Jonesit, S. subcuneatus, S. acutidens 
Rydb. * * * and S. oodes Rydb. * * * seem to be impossible 
to discriminate satisfactorily).”’ S. subcuneatus and S. acutidens, 
especially the latter, are closely related to S. cymbalarioides, but 
the others are not. S. Jonesii is more closely related to S. uin- 
tahensis than to S. cymbalarioides and is perhaps not specifically 
distinct. If not, S. Jonesii is the older name and should be used. 
Senecio Hartianus Heller is given as a synonym of S. pseu- 
daureus Rydb. Professor Nelson may have been led astray by 
myself, for the specimens referred to S. Hartianus in my Flora 
of Colorado are but depauperate specimens of S. pseudaureus. 
The true S. Hartianus is closely related to S. flavulus Greene. 
Senecio pyrrochrous Greene and S. Tracyi Rydb. are made syno- 
nyms of S. longipetiolatus Rydb. They are both more related to 
S. pseudaureus, having cordate or reniform, although entire, basal 
leaves, while in S. longipetiolatus the basal leaves are narrow and 
oblanceolate, tapering into the petioles. 
Senecio fediifolius Rydb. and S. nephrophyllus Rydb. are made 
synonyms of S. discoideus (Hook.) Britton, perhaps because all 
three have usually discoid heads. The original descriptions show 
that they are entirely different plants. S. discoideus should be 
replaced by S. pauciflorus Pursh, which is an older name. Green- 
man and Blankinship* think that S. nephrophyllus is the same as 
S. debilis Nutt. I have not seen the type of the latter and can 
not express any opinion. 
Dr. Greenman some years ago called my attention to the fact 
that the plant usually known as Senecio eremophilus Richardson, 
does not agree with the original. There is a duplicate of the latter 
in the Columbia University herbarium and it differs from the 
Colorado plant in the larger heads, which are 10-12 mm. high 
and about 1 cm. wide and ascending or spreading instead of erect. 
In the Colorado plant the heads are less than 1 cm. high. _S. ere- 
mophilus is a northern plant, its range extending from Manitoba to 
*See Supplement to the Flora of Montana ro2. 
