202 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Ribes saxosum Lindl. ; Hook. Fl. Bor. Am. i : 231 ; B/'bcs oxyacan- 



tJwidcs Brew. & Wats. Bot. Cal. i : 206, mainly [Man. R. M. 96] ; 



not L. ; R. oxyacanthoidcs saxosum Coville, Contr. U. S. Nat. 



Herb. 4 : 100. 



Differs from the eastern R. oxyacant/ioidcs in the presence of 

 stipular bristles on the petioles, glabrous leaves, and stouter but short 

 spines. 



Montana: Bridger Mts., 1896, Flodman, jjj ; John Pcarsall., 

 871. 



Yellowstone Park : Blacktail Deer Creek, 1884, Tweedy, 2^0 

 and 2^1. 



* Ribes leucoderme Heller, Bull. Torr. Bot. Club, 24: 92. 



Nearly related to the two preceding ; characterized by the white 

 or yellowish-white bark on the twigs, and the weak prickles. In 

 open woods, at an altitude of 2000-3000 m. 



Montana: Bridger Mts., June 17, 1897, Rydbcrg ci- Bcsscy, 

 424^; Jack Creek, July 14, 43 iS. 



Ribes irriguum Dougl. Trans. Hort. Soc. 7: 516; Ribes divari- 



catiun irn'otiiun Gray, Am. Nat. 10 : 273 [Man. R. M. 96: Bot. 



Cal. I : 206]. 



Mountains, up to an altitude of 2500 m. 



Montana: Mill Creek, 1887, Tzceedy, 263 ; Great Falls, 1886, 

 /^. W. Anderson, 143; Emigrant Gulch, Aug. 25, 424^11. 



Ribes inerme. 



An apparently unarmed shrub of the Grossularia section, with red- 

 dish-brown bark, as in R. eerctim. Leaves rounded-cordate, about 

 I cm. in diameter, with short petioles, 3-5-cleft with rounded cre- 

 nate lobes, glabrous and shining ; raceme short, about equalling 

 the leaves, 2-4-flowered : hypanthium tinged with yellow and rose- 

 purple, turbinate, about 4 mm. long; sepals oblong, 2-3 mm. long, 

 in anthesis reflexed, later descending ; petals white or rose-color, 

 rhombic-cuneate, about half as long as the sepals ; filaments subu- 

 late, about equalling the sepals ; styles distinct, with the lower por- 

 tion bearded, a little exceeding the stamens. 



It may have been mistaken for 7?. oxyacanthoidcs, but the form 

 of the flower is different, and the leaves are much smaller, jrlabrous 

 and shining. It was found at an altitude of about 2200 m. 



Yellowstone Park: Slough Creek, 1885, Tzvecdy, S30. 



* Ribes echinatura Lindl. Bot. Reg. 16: pi. i34<^. 



