SUPPLEMENT TO THE FLORA OF MONTANA. 65 



Mert. & Koch ; 5. acanlis, Gaud. The small, condensed, more c;f.<=pi- 

 tose form of S. cacspitosa, L., 1-3 cm. high and 1-3 Jiowered, in al- 

 pine situations. 



Single-shot Mountain, Teton Co., 7000 ft., July 4, 1897, R. S. 

 Williams; Mt. Hyalite, 10,000 ft., Aug. I, 1902; Mt. Henry, Teton 

 Co., June 28, 1903, L. M. Umbach. 



Saxifraga Columbiana, Piper, Bull. Torr. Bot. Club, 27: 393. 

 One of the segregates of S. integrifolia, Hook., characterized by hav- 

 ing narrow, obovate-oblong petals, shorter than the calyx lobes and 

 calyx-tube aclnate to the ovary, which is immersed in a lobed disk. 



Bozeman, May, 1887, Peter Koch; Mt. Bridger, May 16, 1901; 

 Plains, June 6, 1902; Thompson Falls, June 7, 1902; Columbia Falls, 

 June 7, 1893, R. S. Williams. 



Saxifraga exarata, Vill. Much more lax than 6\ cacspitosa, L. 

 and the basal leaves are not aggregated, as in that species ; flowering 

 stems weak and ascending. In the spray of the falls with S. dcbilis, 

 Engelm. 



Middle Cr., Gallatin Co., July 7, 1901, W. W. Jones; same locality, 

 July 30, 1902. 



Sftjrifraga integrifolia, Hook. By the splitting up of this com- 

 posite species the true integrifolia is not found in Montana, but is 

 native further west. See Coville, Proc. Biol. Soc. Wash. 7:79 and 

 Small, Bull. Torr. Bot. Club, 23:366. 



Saxifraga Greenei, n. sp. 



S. niralis of most authors, as to the Rocky Mountain species. 

 Apparently annual or biennial from a short, fibrous-rooted cauclex ; 

 acaulescent : leaves ovate to ovate-elliptical, coreaceous, crenately 

 serrate, 15-20 mm. long by about two-thirds as wide, usually with 

 some rusty tomentum beneath, obtuse at apex and narrowed abrupt- 

 ly into a winged, often ciliate petiole of about the length of the 

 blade; scape about 10 (3-16) cm. high, densely glandular-puberu- 

 lent above; flowers nearly sessile in dense terminal head?, bracts 

 linear, scarcely equaling the glabrous calyx: calyx short-turbi- 

 riate, the tube about as long ats the ovate erect acute or obtuse seg- 

 ments, and adherent to ovary; petals elliptical or oboval, narrowed 

 to a sessile base, 2 mm. long, twice the length of the calyx segments,. 

 white, lateral nerves rarely confluent above: carpels widely diver- 

 gent above on maturity, deep purple : bracts and calyx segments 

 usually purplish. 



