252 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Aragallus alpicola. 



Depressed-cespitose, scarcely more than 3-4 cm. high, the short 

 thick stems densely covered with the remnants of old leaves ; stipules 

 membranous, broadly ovate, acute, covered with white silky hairs; 

 leaves all basal, numerous, short, 2-3 cm. long, divergent, white- 

 silky, with 4-6 pairs of oblong, obtuse or acutish leaflets, which are 

 5-8 mm. long ; scape depressed or ascending, often doubly curved, 

 3-4 cm. high; spike very short, subcapitate, 3-8-flowered ; bracts 

 lanceolate or linear, about half as long as the calyx ; the latter 

 cylindric, about 8 mm. long, more or less densely black-hairy, as 

 well as the upper part of the scape, the teeth short, broadly lanceolate, 

 subequal ; corolla about 15 mm. long, sulphur-yellow, the keel tipped 

 with purple; wings broad and broadly emarginate ; pod about 15 

 mm. long and 6 mm. in diameter, divergent, subcoriaceous, ovoid 

 and tipped with a short beak. 



It was at first mistaken for a depauperate form of A. monticola^ 

 but Tweedy's specimens with well developed fruit have persuaded 

 me that it deserves rather specific rank. In ^4. nwiii/cola the fruit is 

 of a much thinner texture, with a longer divergent straight beak; in 

 A. alpicola it is divergent, subcoriaceous and very short-beaked. In 

 that respect it is nearer A. Lanibcrtii and A. splcalus from which it 

 is easily distinguished by its small size. In A. monticola the leaves 

 are mostly erect or ascending, about i dm. long and with 10-15 

 pairs of leaflets, the scape is erect, over i dm. high, and the spike 

 is elongated and many-flowered. 



A. alpicola grows on the very tops of the highest peaks, together 

 with Douglasia montana, at an altitude of over 3000 m. 



Montana: Old Hollowtop, near Pony, July 9, 1897, Rydbcrg & 

 Bessey, 4jOj. 



Yellowstone Park : Mt. Holmes, 1884, Tiuccdy,66; Electric 

 Peak, Aug. 18, 1897, Rydberg & Bessey. 



Aragallus viscidus (Nutt.) Greene, Pittonia, 3: 211; Oxytropis 

 viscida Nutt. ; Torr. & Gray, Fl. N. Am. i : 341 [Man. R. M. 



71]. _ 



On hills, at an altitude of 1000-2000 m. 



Montana: Lima, Rydberg, 2yiy; Great Falls, 1887, 7?. S. Wil- 

 liams, 6ig. 



Oregon: Ntittall (\.y^&). 



Wyoming : Garfield Peak and Gros Ventre, 1894, Avon JVelson, 

 66g and g28 ; Black Rock Creek, 1897, Tweedy, 26^. 



Nevada: East Humbolt Mountains, Watson, 2^2. 



