OF ARTS AND SCIENCES : MAT 30, 1865. 553 



especially toward the base, with some coarse salient teeth. Flowers 

 larger than in any genuine Stephanomeria ; the involucre fully half an 

 inch in length, of more rigid and imbricated scales than in that genus ; 

 the ligules about three lines long, scarcely exceeding the tube of an- 

 thers. Achenia, still young, short, truncate, costate, with wide inter- 

 vals, not at all narrowed at the summit. Bristles of the pappus 15 to 

 20, uniserial, somewhat coalescent at the base, 3 lines long, equalling 

 the tube of the corolla, barbellate-plumose after the manner of a Lia- 

 tris. Plant apparently as much as three feet high ; the base of the 

 stem not seen. 



Crepis Axdersonii : glaber (capitulis exceptis) ; caudice perenni 

 folia oblongo-spathulata vel oblongo-lanceolata laciniato-pinnatifida seu 

 dentata subruncinata scaposque corymboso-ramosos proferente, ramis 

 monocephalis ; involucro glanduloso-pubero vel glabrato 2-3-seriali, 

 squamis lanceolatis, interioribus attenuato-acuminatis discum fructi- 

 ferum adaequantibus ; acheniis fusiformibus sensim brevi-rostratis an- 

 gulato-pluricostatis. — Nevada, in the vicinity of Carson City, chiefly 

 in low grounds. Leaves 2 to 5 inches long, including the tapering 

 base or petiole, sometimes only denticulate or dentate, sometimes pin- 

 natifid and with the lobes laciniate-toothed. Scapes from 10 to 24 

 inches high, angled and strongly striate, usually leafless and with a few 

 linear bracts. Heads three fourths of an inch in length, or some- 

 times smaller ; the involucre more imbricated than in 01 occidentalis 

 and C. runcinata. Flowers golden yellow. Achenia about 3 lines 

 long, smooth, angled with salient ribs and deep furrows. Pappus soft 

 and white. 



HiERACiUM Breweri : humilis (triuncialis ad subpedalem) ; foliis 

 uniformibus oblongo-spathulatis integerrimis cum caule usque ad api- 

 cem folioso pilis longis mollibus albo-villosissimis ; panicula corymbosa 

 polycephala; capitulis parvis 10 - 15-fioris ; involucro subimbricato 

 cylindraceo vix glanduloso cum pedicellis parce piloso ; floribus flavis ; 

 acheniis oblongo-hnearibus baud apice vix basi angustatis. — Silver 

 Valley in the Sierra Nevada, alt. 7,350 feet, and (a dwarfed alpine 

 state) Silver Mountain, alt. 11,000 feet. Somewhat resembling the 

 most hairy forms of H. Scouleri, Hook. ; but dwarf, very leafy to the 

 top, and canescent with very soft shaggy hairs, except the inflores- 

 cence ; the latter of very numerous heads in a crowded panicle. Invo- 

 lucre 3 lines loner. 



