3l6 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Phlox Sabini Dougl. ; Hook. Fl. Bor. Am. 2:72; Phlox spcciosa 



Sabini Gray, Proc. Am. Acad. 3 : 256 [Syn. Fl. 2' : 134]. 



Differs from the preceding and P. spcciosa in the lobes of the 

 corolla, which are not obcordate but truncate-cuneate. Up to an 

 altitude of 2500 m. 



Montana: Gallatin Co., Mrs. Hodg^nan ; Silver Bow Co., Mrs, 

 Nettie Caspar (leaves short and broad, calyx about half as long as 

 the corolla-tube; sepals with scarious auricles). 



Yellowstone Park: 1883, J/«rr Compton. 



* Phlox speciosa Pursh, Fl. Am. Sept. 149 [Svn. Fl. 2': 133; Bot. 



Cal. i: 486]. 



Differs (as well as the following) from P. longifolia in the short 

 style and in lacking the salient angles of the calyx. 



Montana: McDonald's Peak, 1883, Ca«(^j, ^J2 (a tall specimen) ; 

 Bozeman, 1885, Tweedy., 82g. 



* Phlox Kelseyi Britton, Bull. Torr. Bot. Club, 19: 22-^ [111. Fl. 



3: 36]. 



Resembles P. Sta)isbiirvi hrcvifolia i^S. longifolia brcvifolia 

 Gray) : but the stem is seldom glandular, the corolla larger, bluish 

 and with broader generally entire lobes, the leaves with revolute 

 margins and ciliate below, and the young stems wing-angled. 



In rich soil, at an altitude of 1500-2500 m. 



Montana: Helena, 1881, Kclsey ; Beaver Head Co., 1888, 7^. 

 Tweedy, JO, in part; East Gallatin Swamps, 1896, Flodman, yjj ; 

 Twin Bridges, 1892, Mrs. L. A. Fitch. 



* Phlox collina. 



Densely cespitose, from a thick caudex : branches with a light- 

 colored almost white shreddy bark and generallv covered by the 

 leaves; leaves oblong or ovate, 5-15 mm. long and 2-4 mm. wide, 

 a little ciliate on the margin below and on the lower surface, cuspidate ; 

 midrib strong and the margin revolute and chartaceous ; flowers ses- 

 sile ; calyx ciliate, strongly ribbed ; lobes broadh' oblong, acute and 

 cuspidate-tipped, rather shorter than the tube ; corolla bluish or sel- 

 dom white, the tube about half longer than the calvx : lobes rounded 

 obovate, entire or slightly emarginate. 



P. collina is intermediate between P. Kelseyi on one hand and P. 

 alhoniarginata and P. diapcnsioides on the other. It differs from 

 the first in the more condensed habit, in the shorter and thicker 

 leaves and their hard margins, in the shorter and broader calyx- 



