64 MONTANA AGRICULTURAL COLLEGE SCIENCE STUDIES. 



Ribes lentum, Coville & Rose, Proc. Biol. Soc. Wash. 15:26-29 

 (F. V. Coville) ; R. lacnstrc inollc, Gray. In subalpine situations. 



Head of Cottonwood Cr., Tobacco Root Range, 9000 ft., Aug. 

 II, 1902; Single-shot Mts., Teton Co., 7000 ft., July 4, 1897, R. S. 

 Williams. 



Ribes leptanthum, Gray. A small rigid-branched, spiny shrub, 

 2-3 ft. high, in dry rocky places, 6000-8500 ft. altitude in the moun- 

 tains east of the Divide. R. sa.vinwntannm, E. Xelson (Bot. Gaz. 

 30:119)? 



Rocky Canyon, Bozeman, May 26, 1900, 6000 ft. ; Horsefly Pass. 

 Crazy Mts., July 20, 1902, 8000 ft. ; Wilder, July 9, 1897, R. S. 

 Williams. 



Ribes Icucodcrmc, Heller, seems the same as R. irriginim, Dougl. 



Ribes longiflorum, Xutt. in Erasers Catalogue. See Coville, Proc. 

 Biol. Soc. Wash. 15:23. The yellow-flowered currant of the Mis- 

 souri and its tributaries in the plains has longer ( 16 mm.) flowers 

 and the lobes of the leaves acute and straight margined (R. lon^i- 

 flonnii, Xutt.), while the mountain form Ifas shorter (11 mm.) flow- 

 ers, the lobes of the leaves obtuse and incurved toward the apex 

 (R. aurcurn, Pursh). Wibaux. May 25, 1902; Box Elder Cr., Valley 

 Co., July 14, 1900; Fergus Co., Aug. 2, 1901, F. A. Spragg. 



Ribes Purpusi, Koehne, (ined?). ( F. Y. Coville). An unarmed 

 phrub wr<h whitish bark and thin glabrous leaves; flowers 2 or 3 

 .in axillary, usually drooping, racemes; calyx tube campanula: e, 

 greenish >r rarely purplish, with lobes equaling or longer than the 

 tube: petals white, half shorter than the lobes of the calyx; stamens 

 exserted and calyx lobes reflexed on maturity : fruit black, naked. 

 Along shady streams. 



Limekiln Canyon, Bozeman, June 18, 1900: Middle Cr. Canyon. 

 July 31, 1902; Flarhead-Brackett Cr. Divide. July 16, 1902. 



Saxifraga austromontana, Wiegand, Bull. Torr. Bot. Club. 27: 

 380; v$\ cognata, F- Xelson; Bot. Gaz. 30:118. Our Rocky Mountain 

 species of 6\ bronchia/is, L. has been separated as the above, but an ex- 

 amination of any considerable number of Siberian and East Asia 

 specimens will show their great variability and relative approxima- 

 tion to the American forms in leaf and flower, so that separation is 

 questionable. 



Saxifraga caespitosa minima, n. n. ; S. nwschata forma annpacta, 



