22 MINNESOTA STUDIES IN PLANT SCIENCE 



II. Receptacle deeper and broader 



A. Filaments subulate ; sepals spreading 



1. Receptacle adnate to the basal portion of the carpels 



a. Young carpels distinctly bottle-shaped; gland reduced S. klickitatensis 



b. Young carpels conical above the receptacle; mature carpels pyramidal 

 above the fleshy gland S. virginiensis 



2. Receptacle deep, adnate to the lower half of the carpels, or nearly so 



S. nivalis^ 



B. Filaments clavate; sepals spreading 



1. Scapes tall; leaves serrate to sinuate-dentate S. saximontana 



2. Scapes much reduced ; leaves crenate, rusty-tomentose beneath 



S. occidentalis 



Saxifraga Allenit (Small), n. comb. 



Micranthes Allemi Small, N. Am. Fl. 22:2:144. 1905. 



From all appearances a good species, but the specimens are in the early- 

 flowering stage so that the characteristics of the mature fruit and seeds 

 can not be determined and compared with those specimens referred to S. 

 saximontana (g.v.), and which have been confused with it. The relatively 

 large flowers, rather compact cymules, crenately toothed and lanuginous 

 leaves are distinctive. In two of the plants on the sheet the inflorescences 

 are conspicuously thyrsoid (Plate VII). 



Distribution. — Washington. 

 Specimens examined : 



British Columbia: alpine rivulet, small peak above timber line, about 118' 20' W. 

 long., 5V 45' N. lat., alt. 7,500 ft., July 25, 1905, C. H. Shaw, No. 1001 (UMH) ; Car- 

 bonate Draw, Selkirk Mountains, alt. 6,000 ft., July 13, 1904, C. H. Shaw, No. 302 

 (MBG 84110) ; gorge of Carbonate Draw, alt. 6,500 ft., July 13, 1904, C. H. Shaw, No. 

 257 (MBG 84089). 



Washington : near Whistler Pass, east fork of Pasayton River, Okanogan Forest, 

 Okanogan County, alt. 2,340 m., August 4, 1916, Eggleston, No. 13416 (USNH 

 886307) ; Goat Mountains, alt. 5,500 ft., O. D. Allen, No. 242 (MBG 84432). Type! 



Saxifraga Careyana A. Gray, London Journ. Bot. 2:116. 1843. 

 Micranthes Careyana (Gray) Small, Fl. S.E.U.S. 501. 1903. 



Two specimens from the herbarium of the Missouri Botanical Garden, 

 No. 84203, bearing the legend "Saxifraga Careyana Gr. Coll. A. Gray, C. S. 

 Sargent, J. H. Redfield, and Wm. M. Canby, Roan Mt., June 23. Journey 

 to North Carolina, 1879" (merely a poor scape in fruit), and No. 84286, 

 with the legend "Saxifraga Careyana, Gray! Grandfather Mt., N.C. Col- 

 lected by Dr. Gray" afford the only authentic material at hand. The latter 

 consists, however, of the bases of two separate plants with leaves and a 

 single detached scape in poor condition. While the scape and inflorescence 

 appear characteristic of S. Careyanna, the leaves, on the other hand, are 



• The detailed treatment of this species is deferred for a future paper. 



