CATALOGUE. 141 
flowers is sometimes produced into about six small, rigid bristles; involucre 
glutinous, with spreading tips; receptable flattish, alveolate. Separated 
from Gutierrezia by Bentham and Hooker on account of its numerous rays 
and coroniform pappus.—San Pedro River, Arizona (551), and old Camp 
Crittenden, Arizona (667). . 
GuTIERREZIA Kuruamim, T. & G.—(411, 412, 414, 415.) 410 is the 
same, verging toward microcephala; from Colorado, Arizona, New Mexico. 
Number 378 of the Sutton Hayes Collection appears in my herbarium 
under name of G. microcephala, and doubtless correctly, but it is so near 
some forms obtained by the Expedition that pass for G. Huthamie that one 
may well doubt the propriety of keeping them distinct. 
GRINDELIA sQuARROSA, Dunal.—Colorado (Loew, 100). Utah. 
GRINDELIA MICROCEPHALA, DC. (G. inuloides, Willd., var. microcephala, 
Gray, Bot. Mex. Bound, p. 8!.)—Stems erect, smooth, branching some- 
what; leaves thick, rigid, oblong, entire or slightly toothed toward the apex. 
Amplexicaule or sessile, inflorescence cymose (?); pappus (in my specimen) 
none in the ray-flower, and of only two awns in the disk; scales of the 
involucre almost always destitute of subulate tips, thick, oblong, and 
acute in several series, the inner of which are the larger; achenia flat- 
tened, four-angled, with corky angles, smooth—Southern Arizona (796). 
- _Hererorseca* scasra, DC.—Erect, much branching, somewhat rough, 
with long, spreading hairs arising from glandular bases; upper leaves 
rough, veiny, sessile or clasping, oblong or ovate, entire or toothed ; lower 
ones petioled; inflorescence in a spreading panicle; achenia of the ray 
smooth, of the disk densely covered with appressed silky hairs.—Moist 
ground near Camp Lowell, Ariz. (703). 
Curysopsis vILLosa, Nutt—From among the multitude of forms under 
* HETEROTHECA, Cass.—Heads hetere gamous, tadiate, with the rays in 1-2 series and pistillate; 
flowers of the disk perfect. Involucre hemispherical or broadly campanulate; bracts imbricated in many 
series, narrow margin subscarious, exterior ones smaller. Receptacle flat, alveolate, fimbrillate. Female 
styles of the perfect flowers flat, with long, narrow, or sometimes triangular and short appendages. 
Achenia flat, with a thickish margin and an obtuse apex. Pappus of the ray none, of the disk of an 
outer series of very short bristles, and ap inner series of long scabrous bristles.—Erect, rough herbs, 
with alternate 9nd often dentate leaves. Heads rather large, loosely paniculate or in a close corymb. 
Flowers all yellow. Achenia glabrous or silky villous. Pappus rusty-colored.—BENTHAM & HOOKER. 
