SOME RUDBECKIA SEGREGATES. 179 
Specimen collected by B. F. Bush (No. 137), in Shannon 
County, Mo.; and deposited in the United States National 
Herbarium. It was labelled R. hirta; but its leaves are re- 
markably different from all others in this group, both in 
outline and pubescence. The long and narrow involucral 
bracts and the differently shaped and larger heads also 
distinguish this plant from R. hirta. 
» R. FLAVA. Possibly annual: simple, hirsute, the glossy 
whitish stems, 12 to 18 inches high, purple-dotted: basal 
leaves about 3-inches long, oblong-lanceolate, tapering spat- 
ulately to a petiole about 2 inches long, remotely denticulate 
or entire, obtuse, 3-nerved, strigose; the lower cauline lan- 
ceolate, tapering spatulately to a broadly margined petiole, 
that is plainly marked by a sharply defined more or less 
broad, white vein, subentire, finely strigose: peduncles 3 to 
8 inches long, hirsute: involucral bracts oblong-linear, 8 
to 10 lines long, hispid with fine white hairs: rays.ovate- 
oblong, 1 inch long, of a very light-yellow in comparison 
with those of the eastern species. . 
Specimens collected. by Aven Nelson (No. 600) near the 
Big Muddy, Wyoming, in 1894: by Dr. Greene near Bear 
Creek, Col, on his journey of 1889, and by Crandall and 
Cowen (No. 277) in the Foot Hills of northern Colorado. 
The light-green leaves and straw-colored glossy stems give 
this plant an aspect which is wholly unlike that of its 
eastern analogues. 
R. BICOLOR, Nutt. Jour. Acad. Philad., vii, 81. Annual, 
12 to 14 inches high, stoutish, erect, simple or sometimes 
branched: stem striate, hispid: basal leaves lanceolate-ovate, 
spatulate, cauline leaves lanceolate, oblong, sessile; all 
triple-nerved, obtuse, subentire, strigose-hispid: peduncles 
short, 2 to 3 inches long, hispid or hirsute: involucral 
