CATALOGUE. 
311 
gradually reduced in size, sometimes subconnate at base ; involucre pedicelled, 
the awns often unequal ; pedicels naked, at least the lower alar ones very 
slender. Var. {O.foliosa, Nutt.) A large stout and leafy form, 6'-!'' high, 
rather sparingly branched, the conspicuous cauline leaves broad and connate 
at base ; involucres about l" long, exceeding the awns ; calyx white or pinkish, 
the outer segments pubescent, broad-oblong, obtuse, the inner more delicate, 
narrower and a little shorter ; ovary glabrous, as in otlier species. — Southern 
Idaho, (Nuttall ;) near Empire City, Nevada, (Dr. Torrey.) Monitor Valley, 
Nevada; 5,000 feet altitude ; July. (1,040.) 
Var. Very slender ; branches very numerous and many-flowered; upper 
leaves small and inconspicuous ; involucres very small, long or less, shorter 
than the awns ; inner segments of the calyx emargiuatc. — Resembling the 
Chilian form. Pah-Ute Mountains and Monitor Valley, Nevada ; 5,000 feet 
altitude; July-September. (1,041.) 
OxYTHECA Watsoni, T. & G.; I. c.^ 2^. 191. ElTusely much branched, 
4-10' high; radical leaves i-H' long, oblong-spatulate, scarcely mucrouate, 
pubescent ; bracts ovate or ovate-lanceolate, mucronate with a loug awn, 
usually connate but only at the base and mostly on one side, (where there is 
often an accessory awned lobe,) diminishing upward, rigid and usually de- 
curved, the uppermost reduced ones and the lobes of the involucre half shorter 
than their rigid awns, (^-2" long;) involucres about 3-flowered, subsessile 
in the axils, or terminating short bibracteolate pedicels. — The glaudular 
pubescence is more dense above the nodes and sometimes stellate. Monitor 
Valley, Nevada ; 5,500 feet altitude ; July. Plate XXXIII. Fig. 5. A 
small plant ; natural size. Fig. 6. A node with bracts, involucre and flower; 
enlarged four diameters. Fig. 7. A flower, expanded ; enlarged eight diame- 
ters. (1,042.) 
OxYTHECA PEEFOLiATA, T. & G.; /. c, j?. 191. Closely rcsemlding 
Chorizanthe perfoHata, low (3-G',) divaricately branched, glandular-pubescent 
on the lower half of the internodes ; leaves scabrous, becoming glaucous, 
red and chartaceous in older specimens, the radical ones spatulate, ciliate, the 
cauHne or bracts i-1' in diameter, scarcely diminishing upward, (half the 
length of the internodes,) centrally perfoliate, excepting the lowest whorl of 
3-4 small leaves, which are connate only at base, disk-shaped, suljtriangular- 
orbicular, rcticulately veined, 3-awncd ; involucres sessile in the axils, solitary, 
the lobes U" long, subulate-lanceolate, equaling their awns, with 4-6 con- 
