178 PITTONIA. 
Specimen collected by Mr. A. H. Curtiss (No. 4,759) in 
the pine barrens near Jacksonville, Fla., and observed in 
the United States National Herbarium under the name of 
R. bicolor, Nutt. The light brown disk alone would dis- 
tinetly separate this plant from all other members of this 
group. 
/ R. LONGIPES. Perennial, slender, about 2 or 3 feet high, 
with several sparingly hispid stems from the same root: 
basal leaves, lanceolate, tapering equably at both ends, 
acutish, remotely denticulate; petioles very slender, 4 to 8 
inches long, hispid; lower cauline lanceolate, subentire, 
about 3 inches long, with margined petioles about 14 inch 
long; the upper oblanceolate, entire, sessile; all 3-nerved, 
strigose: involucral bracts oblong-linear, hispid: rays 12 to 
13 light yellow, linear: disk short, conical. 
Specimens collected by Geo. G. Grower at Laberg, N. Y. 
in 1884: by J. B. Brinton at Flat Rock, Penna. in 1888: 
by L. H. Pammel (No. 55), at Ames, Iowa. It was labelled 
R. hirta; but its more slender and simpler habit, the very 
long petioles of its root-leaves, its longer and narrower in- 
volucral bracts and rays do not allow of its being classed 
with the R. hirta of Linnzus. 
v R. SERICEA. Probably perennial: simple, erect, spar- 
ingly hispid: basal leaves not seen: cauline linear-lanceo- 
late, remotely toothed, obtuse, about 3 or 4 inches long, 
3-nerved, the veins being white below but above incon- 
spicuous of themselves, yet their direction is plainly marked 
by the silky canescent pubescence, which is especially 
heavy at each vein; the lower gradually taper to mar- 
gined petioles: involucral bracts $ inch long, lanceolate 
subulate, pustulose-hispid: rays about 12, linear oblanceo- 
late, more than 1} inch long: disk rounded conical. 
