JOHNSON: A REVISION OF THE SECTION BORAPHILA 29 



Specimens examined : 



Montana: Herbarium of the University of Montana, two sheets, for convenience 

 designated "a" and "b." Sheet "a" type, determined by P. A. Rydberg as S. idahoensis; 

 Missoula, M. F. Elrod, No. 98, determined as 5". reflexa montana by /. W. Blankinship 

 with the note: "Has leaves of S. reflexa Hook, and inflorescence of S. Nutkana Moc, 

 Either an intergrade or a new species." 



Saxifraga occidentalis Wats., Proc. Am. Acad. 23 :264. 1888. 

 Micranthes occidentalis (Wats.) Small, N. Am. Fl. 22:2:144. 1905. 



Distribution. — The exact range of this species is not known at present. According 

 to Small {I.e.) it is distributed from "Alberta to Montana," a delimitation which is 

 quite at variance with that given by him in Bull. Torr. Bot. Club, 23 :362, 1896, which 

 reads, "apparently confined to Vancouver island and the mainland in the immediate 

 vicinity." No published explanation of the difference is known to the writer. Dr. 

 Watson's own account reads : "From the Rocky Mountains of British America 

 (Drummond) to British Columbia and Vancouver Island (Lyall, Macoun). Oregon 

 (Cusick, Henderson, Howell), and the northern Sierra Nevada (Chico, Mrs. J. Bid- 

 well; Gray)." The Cusick specimen is very likely the one listed above. The type 

 locality, according to Small (I.e.), is the "Rocky Mountains." 



It is to be noted in this connection that Small's description of this 

 species in Bull. Torr. Bot. Chtb, 23:362 is conspicuously at variance with 

 the description he has given in North American Flora, 22:2:145, 1905, par- 

 ticularly in respect to the leaves. It seems that the descriptions must have 

 been based on two rather different plants. 



V.9. occidentalis Wats, is a small species with finely crenate leaves, which 

 are also commonly deep vinous red and more or less reddish tomentose 

 beneath. The scapes are sometimes stout, with a few-flowered, cymose in- 

 florescence, and stout carpels. It is easily mistaken for S. riifidula (Small), 

 except for its clavate filaments and obviously deeper receptacle. Elmer's 

 specimen (2646) has been erroneously referred to S. rufidula by Engler 

 and Irmscher on their label on the herbarium sheet (Plate X). 



Specimens examined: 



Oregon: Powder River Mountains, as S. nivalis; W. C. Cusiek (UMH). 



Washington: Mt. Rainier, "On rock cliffs," alt. 7,000 ft, August, 1895, as S. 

 nivalis, C. V. Piper, No. 2034 (UMH) ; Olympic Mountains, Clallam County, July, 

 1900, Elmer, No. 2646 (USNH 401969), as S. nivalis. 



Saxifraga petiolata sp. nov. 



Receptaculum ovarii base adnatum, carpidia 2, nonnunquam 3, supra 

 basin glandula dilatata cincta dorso conspicue uni-costato, stylis attenuatis 

 elongatis, stigmatibus parvis oblongis, filamenta clavata inferne angustata, 

 antheris purpureis, sepala oblongo-ovata reflexa base conspicue coalita 2-2.5 

 mm., petala ovata vel elliptica obscure retusa ad basin maxime contracta 

 3-3.5 mm., semina ellipitico-ovata superne latissima et ad apicem tuberculata 

 longitudinaliter sulcata, folia basalia longe petiolata ovata vel oblongo-ovata 

 subcordata marginibus sinuato- vel crenato-dentatis, scapus altus erectus 



