215 
+ + Disk hemispherical to oblong-ovoid in fruit, dark-purple or brown. 
++ Lower leaves 3-lobed or parted. 
4. R. subtomentosa Pursh. Stem branching above, 9 to 12 dm. high, downy, 
as well as the petiolate ovate or ovate-lanceolate serrate leaves beneath: heads 
short-peduncled: disk globular, dull-brown: chaff downy at the blunt apex.—Ex- 
tending from the northern prairies into Texas. 
++ ++ Leaves undivided, rarely laciniately toothed. 
= Style-tips slender-subulate : achencs wholly destitute of pappus: chaff hairy at tip. 
5. R. bicolor Nutt. Hispid with spreading bristly hairs, rather slender, 3 to 6 
dm. high: leaves from lanceolate to oblong or the lower obovate, nearly entire, 2.5 
to 5cem., long, nearly all sessile: rays 12 to 20 mm. long, pure yellow, or with brown 
purple spots at base, or the lower half deep blackish-purple; disk black.—Pine 
woods or sandy soil, eastern and southern Texas. 
6. R.hirta L. Rough-hispid and hirsute, stouter, 3 to 9 dm. high: leaves from 
oblong to lanceolate, sparingly serrate or nearly entire, 5 to 12.5 em. long, the lower 
narrowed into margined petioles: rays 2.5 to5 cm. long, golden yellow, sometimes 
deeper-colored toward the base: disk at first nearly black, in age dull brown.—Dry 
and open ground, throughout Texas, 
= = Style-tips short and thickened: pappus evident, 
7. R. fulgida Ait. Hispid or hirsute, 3 to 6 dm. high: leaves from narrowly to 
oblong-lanceolate, mostly entire; lowest and radical spatulate-lanceolate and taper- 
ing into slender petioles: rays about 12, golden yellow, equalling or exceeding the 
ample involucre: chaff of the dark purple disk nearly smooth: pappus a very short 
commonly 4-toothed crown.—Dry soil, extending into Texas from the Atlantie 
States. 
8. R. alismeefolia Torr. & Gray. Glabrous or minutely scabrous, usually simple, 
6 to 9 dm. high: leaves oval, obtuse or sometimes acute, obscurely repand-dentate 
or entire, 7.5 to 15 em. long, abruptly contracted into the petiole: involuere rather 
small: rays 10 to 15, light yellow and soon drooping, 2.5 to 5 em. long: chaff of the 
browner disk pubescent at tip: pappus a conspicuous cup-shaped irregularly dentate 
or crenate crown.—Plains and open pine woods of Eastern Texas, 
62. LEPACHYS Raf. 
Perennial herbs, with alternate pinnately divided leaves, the stems 
or branches naked above and bearing single showy heads with yellow or 
particolored drooping neutral rays, grayish disk, few small spreading 
involucral bracts, oblong or columnar receptacle with truncate chatt 
thickened and bearded at tip and partly embracing the flattened and 
margined achenes, and pappus none or of 2 teeth. 
* Achenes with convex or obscurely angled faces, commonly with a scarious and more or 
less ciliate margin. 
1, L. Tagetes Gray. Strigulose-cinereous, 3 dm. high, branching, leafy: leaves 
thickish, mostly with 3 to 7 narrowly linear rather rigid lobes: heads rather short- 
peduncled: rays 6 to 12 mm. long: disk globose to barely oblong, 12 mm. high: pap- 
pus of 1 or 2 subulate or awn-like deciduous teeth, and no intermediate scales, (L. 
columnaris, var. Tagetes Gray.)—Alluvial plains, western Texas. 
2. L. columnaris Torr. & Gray. Strigose-scabrous, 3 to 6 dm. high, branching 
from the base, terminated by long peduncles bearing a showy head: divisions of the 
} y o 5 
cauline leaves 5 to 9, from oblong to narrowly linear, sometimes 2 to 3-cleft: rays 
commonly 2.5 cm. long or more, normally all yellow: disk at length columnar, 2.5 
cm. long or more: pappus of the preceding, but usually with a series of minute and 
