3l8 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



lanceolate, straight and almost erect, while in P. diapcnsioidcs they 

 are curved, spreading and ovate. In the type specimens of the for- 

 mer, in the Columbia Herbarium, the limb of the corolla is only 5 

 mm. in diameter, while in the latter it is almost twice as broad. P, 

 diapensioides is evidently nearest related to the preceding, differing 

 in the sessile flowers, the less glandular calyx and the shorter corolla- 

 tube ; in P. diapensioides this is about twice as long as the calyx, 

 while in P. Andersonii it is about three times as long. Grows on 

 drv hills, at an altitude of 2000—3000 m. 



Montana: Madison Valley, 1887, Tzvecdv,283; Beaver Head 

 Co., 1888, 2g; Pole Creek, July 4, 1897, Rydbej-g & Bessey, ^816 ; 

 Mt. Helena, 1882, Canby (densely pulvinate and with small leaves, 

 the calyx-lobes long in fruit); 1887, Kclscy ; 1883, Canby, 2jo (dif- 

 fers from the ordinary form in the stem which is 3 cm. high, and 

 in the calyx with its long spinose tips). 



* CoUomia grandiflora Dougl. ; Lindl. Bot. Reg. 1174 [Syn. Fl. 2^: 



135 ; Bot. Cal. I : 487] ; Gj'Iia grandiJlo7'a Gray, Proc. Am. 

 Acad. 17: 223 [Syn. Fl. 2*: 408]. 



Like the next, but taller; corolla twice as large. Plains, rare. 

 Montana: Coeur d'Alene, 1891, Kelsey. 



Collomia linearis Xutt. Gen. PI. i: 126 [111. Fl. 3 : 42 ; Syn. Fl. 



2' : 135 ; Bot. Cal. i : 486] ; Gilia linearis Gray, Proc. Am. Acad. 



17: 223 [Syn. Fl. 2': 408; Man. R. M. 249]. 



In wet sandy soil, up to an altitude of 2500 m. 



Montana: Bozeman, 1887, F. Tweedy, 287; Spanish Basin, 

 1896, Fiodnian, 7j8 ; June 26-30, 1897, Rydberg & Besscy, 48 2g, 

 48JO, 48J2 and 48JJ ; Bridger Mountains, June 14, 48J1 ; Bozeman, 

 1895, Rydberg, 276^ ; Clendenin, 1882, R. S. Williams, 143; 

 Lewis and Clarke Co., Mrs. Mtith; 1883, Scribncr, ijg. 



Yellowstone Park: 1884, P. Tweedy, 2gy ; Mammoth Hot 

 Springs, 1885, ^-~' 



* Collomia aristella (Gray) ; Gilia aristclla Gray, S3'n. Fl. 2' : 408. 



Like a small form of the preceding, but with aristiform calyx- 

 lobes. Rare. 



Montana: Prickly Pear Canon, 1887, R. S. Williams, 811. 



Collomia gracilis (Hook.) Dougl. ; Benth. Bot. Reg. 1622 [Syn. Fl. 

 2^ : 135 ; Bot. Cal. i : 488] ; Gilia gracilis Hook. Bot. Mag. 

 2^24 [Syn. Fl. 2': 408; 111. Fl. 3 : 38 ; Man. R. M. 249]. 

 Hillsides, up to an altitude of 2000 m. 



