MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 349 



1888, Tzcecdy, j6 ; Lima, 1895, Rydberg, 2782; Spanish Basin, 

 1896, Flodman, y6g and Jjo; Anaconda, 1892, Kelsey ; Willow- 

 Creek, 1883, Scribner, i8y. 

 Pentstemon glaucus Graham, Edinb. N. Phil. Journ. 1829: 348 



[Syn. Fl. 2': 268; Man. R. M. 277]. 



In the mountains, at high altitudes. 



Yellowstone Park: Hoodoo Peak, 1897, P. Koch, 5. 

 Pentstemon pumilus Nutt. Journ. Acad. Sci. Phila. 7: 46 [Syn. Fl. 



2^ 269; Man. R. M. 278]. 



A very rare plant from the Rockies. 



Montana : Little Goddin River, Wyct/i. 

 Pentstemon deustus Dougl. Lindl. Bot. Reg. ijiS [Syn. Fl. 2^: 



269; Bot. Cal. i: 559; Man. R. M. 276]. 



In the mountain regions, up to an altitude of 2500 m. 



Montana: Park Co., 1887, Tzvecdy, j8 ; Horse Plains, 1883, 

 //. B. Avres, 4a; Ross' Hole, 1880, Watson. 



Yellowstone Park: 1873, C. C. Pai'ry^ 2oy ; 1888, Dr. 

 Chas. H. Hall; Junction Butte, 1885, Tweedy, 86S. 



* Pentstemon diphyllus. 



Stem much branched, from a perennial base, minutely puberulent 

 all over and more or less glandular on the upper portion, 2-3 dm. 

 high ; leaves opposite, 3-5 cm. long, with short but slender petioles, 

 or the uppermost sessile, lanceolate, acute, sinuately dentate with di- 

 vergent teeth ; intlorescence leafy, paniculate ; flowers on very short 

 pedicels, 15-18 mm. long; calyx glandular-pubescent, cleft to near 

 the base into very unequal lobes about 5 mm. long ; corolla curved, 

 funnelform ; sterile stamen filiform, only slightly thickened at the 

 apex, sparingly bearded. 



Nearest related to P. triphylliis, and Dr. Gray included in the 

 latter Cooper's rather fragmentary specimens. It is, however, a very 

 distinct species, differing in the more leafy and more branched habit, 

 the broader and opposite leaves, and the narrower and less bearded 

 sterile stamen. Grow\s in rocky woods. 



Montana: Mullen Pass, i860, y. G. Cooper; Soap Gulch, Sil- 

 ver Bow Co., 1888, Tweedy, 72. 

 CoUinsia parviflora Dougl.; Lindl. Bot. Reg. 1082 [Syn. Fl. 2': 



256; Bot. Cal. i: 555; Man. R. M. 273]. 



On mountain-sides, especially in sandy soil, up to an altitude of 

 2500 m. 



