470 RypBerRG: Rocky MouNTAIN FLORA 
- sides the difference in the achenes, Tweedy 586 has longer and 
narrower rays and more deeply dissected stem-leaves than has 
S. flavulus. Since the publication of S. flavovirens we have re- 
ceived more specimens with long and narrow rays, but otherwise 
resembling closely S. flavulus. All these specimens have also 
hispidulous achenes. 
Wvominc: Buffalo Fork, Aug. 1897, Tweedy 586 (type, in 
herb. N. Y. Bot. Gard.); Snake River, Aug. 12, 1899, Aven 
Nelson & Elias Nelson 6402; headwaters of Clear Creek and 
Crazy Woman River, 1900, Tweedy 3031; low ground, Adams 
Ranch, Jackson’s Hole, July 15, 1901, Merrill & Wilcox, 967. 
Montana: Lima, June 30, 1895, Shear 3400. 
The following species described from within the range of the 
New Manual or known to exist therein are not accounted for at 
all in that publication: S. seridophyllus Greene, S. lanceolatus 
T. &. G., S. perezitfolius Rydb., S. neomexicanus A. Gray, S. lara- 
miensis A. Nels., S. Hallii Britton, S. exaltatus Nutt., S. Scrib- 
nert Rydb., S. Porteri Greene, S. alpicola Rydb., S. turbinatus 
Rydb., S. pentadontus Greene, S. cognatus Greene, and S. Wardit 
Greene. 
Greene and Greenman regard Senecio altus Rydb. as a syno- 
nym of S. sphaerocephalus Greene, and I think that S. perennans 
A. Nels. is but a broad-leaved form of S. werneriaefolius A. Gray. 
Blankinship in his Supplement to the Flora of Montana 
adopts Senecio saxosus Klatt, giving under it the synonyms: 
S. petraeus Klatt, S. petrocallis Greene, and S. alpicola Rydb. I 
can not find that S. saxosus Klatt was ever published. S. petraeus 
Klatt, or S. petrocallis Greene, is not found in Montana and S. 
alpicola is well distinct, being more closely related to S. werner- 
iaefolius than to S. petrocallis. 
TETRADYMIA 
In the New Manual, Tetradymia multicaulis A. Nels. and 
T. linearis Rydb. are given as synonyms of T. inermis Nutt. 
The first I regard as a low depauperate form of T. inermis, but the 
second can not well be reduced to a synonym thereof. It is some- 
what intermediate between Tetradymia canescens and T. glabrata. 
Except in the early spring it bears fasciculate leaves, as does T. 
