180 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
oblong-lanceolate, obtuse, often abruptly short-acuiminate, thick, canescent; 
heads crowded, 3 to 8 at the end of each branch, about 1 cm. broad, subtended 
by numerous ovate to elliptic, thin, bract-like leaves, these long-ciliate; in- 
volucral bracts thin and membranous, linear or linear-lanceolate, in several 
series, acute, canescent; the very short peduncles densely white-villous; rays 
numerous, dull yellow, about 9 mm. long; achenes compressed, densely villous. 
Type in the U. 8S. National Herbarium, no. 330718, collected in the Organ 
Mountains at an altitude of 1,440 meters, September 1, 1897, by E. O. Wooton 
(no. 509). 
ADDITIONAL SPECIMENS EXAMINED: Pena Blanca, October 21, 1906, Wooton & 
Standley; San Augustine Ranch, September 1, 1897, Wooton; 1851, Wright; 
Organ Mountains, September 4, 1898, Cockerell; Van Pattens, September 10, 
1899, Wooton. 
This is related to C. fulerata Greene, which grows in the same range of 
mountains, but it has abundant, long, white pubescence, while in that species 
the pubescence is short and not conspicuously white. C, senilis, too, has mostly 
grayish, narrower leaves and there are several heads clustered at the ends of 
each branch, while in C. fulcrata the heads are usually solitary. 
Sideranthus laevis Wooton & Standley, sp. nov. 
Perennial from a thick, woody root; stems slender, much branched, erect, 
the branches ascending, bright green, glabrous; leaves linear or linear-oblong, 
bright green, glabrous, entire or sparingly serrate, the teeth low and incon- 
spicuous; heads few, solitary, 8 or 9 mm. broad, on slender peduncles; bracts 
linear or linear-lanceolate, acute, glabrous or sparingly puberulent ; rays pale 
yellow, 4 mm. long; achenes small, densely sericeous, the pappus evidently 
barbellate, 
Type in the U. 8. National Herbarium, no. 564582, collected on gypsum hills 
near Lakewood, August 6, 1909, by E. O. Wooton. 
From its lack of pubescence this might be confused with S. glaberrimus 
Rydb., but in appearance the two are really very unlike. Our plant is much 
more slender, is much branched, and has fewer heads and narrow, shallowly 
toothed leaves, and the whole plant is of a bright green, while the stems and 
foliage of S. glaberrimus are dull and somewhat glaucous. 
Sideranthus viscidus Wooton & Standley, sp. nov. 
Stems stout, branched, ascending or spreading, densely glandular-puberulent, 
50 cm. high or less; cauline leaves thick, humerous, oblong, obtuse, sessile, 
coarsely serrate, the teeth not spinulose, densely viscid; heads few, on slender 
peduncles, cumpanulate, about 12 mm. broad; bracts linear, with evident green 
tips, glandular-puberulent; rays few, short, not more than 5 mm. long; achenes 
nearly 3 mm. long, densely sericeous, with tawny pappus 5 or 6 mm. long. 
Type in the U. S. National Herbarium, no. 690240, collected near Hope, 
August 3, 1905, by E. O. Wooton. 
ADDITIONAL SPECIMENS EXAMINED: Dayton, October 3, 1907, Z. BS. Wigsdale. 
Very different from our other species in the form of its leaves and in its 
densely viscid pubescence. 
Isocoma oxylepis Wooton & Standley, sp. nov. 
Perennial, about 30 em. high, with numerous stems from a thick, woody 
root; stems slender, glabrous, densely leafy, erect, ending in a corymblose 
inflorescence; leaves linear, acute, glabrous or scaberulous, 4 cm. long or less, 
weak and spreading or reflexed; heads very numerous, all on slender peduncles 
1 em. long lor shorter; involucre narrowly campanulate, about 4 mm. high; 
bracts glabrous or nearly so, lanceolate or oblong-lanceolate, acute; throat of 
