CATALOGUE. 155 



linear, mostly obtuse ; flowers of tlie ray 12-15, of the disk about 20. 

 Stream-banks, mountains of Western Nevada to the East Humboldt Moun- 

 tains ; 5,500-7,000 feet elevation ; August, September. A very showy plant, 

 nearly intermediate between the true S. Guiradonis and 8. speciosa ; it has 

 however the elongated leaves and the very short rays of the former, and the 

 stem is moreover perfectly smooth, even to the smallest branchlets of the 

 panicle. (556.) 



SoLiDAGO PUMiLA, T. & G. Csespitose, glabrous and somewhat resinous; 

 stems 4-9' high, very many from a stout underground woody caudex ; leaves 

 crowded, narrowly lanceolate, strongly 3-nerved, very acute and somewhat 

 mucronate ; the radical 2-3' long, 2-3" wide, narrowed into a short petiole ; 

 heads sessile in little clusters which are arranged in a dense fastigiate 

 corymb ; involucres cylindrical-oblong, the closely imbricated scales carinate, 

 ovate or oblong, obtuse, with scarious margins and appressed scarcely her- 

 baceous tips, rather obtuse ; rays 1-3 ; disk-flowers 3-4 ; achenia glabrous. — 

 Colorado, (Vasey,) and New Mexico ; " western declivity of the Rocky 

 Mountains," (Nuttall.) Western Nevada, East Humboldt Mountains, and 

 the Wahsatch; 5-6,500 feet elevation; May-August. (557.) 



SoLiDAGO NEMOEALis, Ait. Saskatchewan and Canada ; throughout the 

 United States westward to Texas and New Mexico. Southeastern Idaho 

 and in the Wahsatch; 6,000 feet elevation; July-October; forms with 

 mostly entire, sparingly roughened, elliptical leaves, indicating a transition 

 towards 8-. Radula. (558.) A form of this plant, with stems 8-12' high, 

 leaves more canescent, and the heads disposed somewhat corymbosely, makes 

 a close approach to 8. nana. Colorado, (248 Hall & Harbour.) Ruby 

 Valley, Nevada, and Bear River Valley, Utah; 6,000 feet elevation; 

 July. (559.) 



SoLiDAGO ELONGATA, Nutt. Stem puberulent, becoming smoothish, 

 1-4° high, erect from a creeping rhizoma ; leaves crowded, uniform, lanceo- 

 late, narrowed at both ends, acute, 3-nerved, veinlets reticulated, sparingly 

 serrate, minutely scabrous on the margins and along the veins beneath ; 

 panicle one-sided, rather dense, elongated or pyramidal, with recurved 

 branches ; heads mostly rather small ; involucral scales loosely imbricated, 

 linear-subulate, without greenish tips ; rays small and narrow, more numerous 

 than the disk-flowers ; achenia pubescent. — ^Arctic America to California and 

 New Mexico. Virginia City, (Bloomer.) Var, ^. T. & G. " Leaves lanceo- 



