200 BOTANY. 



the Wahsatch near Parley's Park ; 6,500-7,000 feet elevation ; July-Sep- 

 tember. (703.) 



HiERACiuM ALBiFLOEUM, Hook. Stems 1-3° high, rather slender, smooth 

 above, hispid near the base, like the petioles and midribs, vs'ith rather long 

 deflexed hairs ; leaves mostly radical or low on the stem, oblong-lanceolate, 

 acute, entire or denticulate ; heads rather small, on nearly smooth bracteolate 

 pedicels, in a compound at length very open corymb ; involucre nearly 

 ecalyculate, the blackish scales sparsely hairy ; flowers white, about 20 ; 

 achenia very slightly narrowed toward the summit. — Rocky Mountains of 

 British America to Oregon and California, and eastward to Colorado; Carson 

 City, (Anderson.) Cottonwood Canon in the Wahsatch, and Bear River 

 Canon, Uintas ; 7-8,000 feet elevation; July, August. (704.) 



HiEEACiUM TRISTE, Willd. Stem slender, simple, 6-15' high, smooth 

 below, hispid with blackish-fuscous hair above ; leaves chiefly radical, hirsut- 

 ulous or smooth, entire or remotely denticulate, tapering into slender petioles ; 

 heads few in a simple raceme or corymb ; involucres hispid with blackish 

 hairs ; flowers 20-40 ; achenia oblong, not tapering to the summit. — Unalaska, 

 and in the Rocky Mountains of Northern British America, to California and 

 the Mountains of Colorado. Ridges of the Uintas, above Bear River Canon, 

 at 9-10,000 feet elevation; August. (705.) 



Lygodesmia juncea, Don. From the Saskatchewan along the moun- 

 tains to New Mexico and Texas, and eastward to Wisconsin. Gravelly slopes 

 of Unionville Valley, Nevada ; 5,000 feet elevation; June. Flowers light- 

 pink ; the ordinary form, with the leaves very slender, not over 2' long, and 

 the involucre 6" long. (706.) 



Var. DiANTHOPSis. (L. juncea, Dur. Bot. Utah., 169.) Involucre 9-11" 



long; ligules exserted quite as much, 3" wide ; leaves rather stout, 2-4" long. 



Islands of Great SaltLake, and gravelly slopes near the city ; May, June. 

 Collected also by Stansbury, by Mrs. Carrington, and by Frdmont in his 

 second expedition. Heads very much resembling a single-flowered carnation, 

 and the leaves also are not dissimilar. (707.) 



Lygodesmia spinosa, Nutt. Stems 8-14' high, several from a woody 

 base, bearing many short divergent very rigid and spine-like branches ; 

 radical and lower leaves linear, 2-3' long, the former with tufts of matted wool 

 in their axils, the wool afterward enveloping the base of the stem; upper 

 leaves reduced to minute subulate bracts; heads usually solitary on the ends 



