470 Rydberg : 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. flavulns. Since the publication of S. flavovirens we have re- 

 ceived more specimens with long and narrow rays, but otherwise 

 resembling closely 5. flavulus. All these specimens have also 

 hispidulous achenes. 



Wyoming: 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, Tiveedy 30J1; low ground, Adams 

 Ranch, Jackson's Hole, July 15, 1901, Merrill & Wilcox, 967. 



Montana: Lima, June 30, 1895, Shear 3409. 



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. pereziifolius Rydb., S. neomexicanus A. Gray, S. lara- 

 miensis A. Nels., S. Hallii Britton, S. exaltatus Nutt., S. Scrib- 

 neri Rydb., S. Porteri Greene, 6 1 . alpicola Rydb., 5. turbinatus 

 Rydb., 5. pentadontns Greene, 5. cognatus Greene, and S. Wardii 

 Greene. 



Greene and Greenman regard Senecio altus Rydb. as a syno- 

 nym of 5. sphaerocephalus Greene, and I think that 5. 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. petraens Klatt, 5. petrocallis Greene, and S. alpicola Rydb. I 

 can not find that S. saxosus Klatt was ever published. 5. petraens 

 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 5. petrocallis. 



TETRADYMIA 



In the New Manual, Tetrad ymia midticaulis 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. 



