186 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
ADDITIONAL SPECIMENS EXAMINED: Chama, 1899, Baker; Chama, alt. 2,400 
meters, 1911, Standley 6744; Dulce, alt. 2,400 meters, 1911, Standley 8088 and 
8179. 
This is another species of the macranthus group, apparently, with pubescence 
very different from that of the related species. The plant is common about 
Chama and Dulce, growing in the moist meadows along the small streams. 
Erigeron tonsus Wooton & Standley, sp. nov. 
Biennial or a short-lived perennial, from a slender, short root; stems very 
slender, flagelliform, spreading and forming dense mats, 20 cm. long or less, 
glabrous or with a few scattered, appressed hairs, bright green; basal leaves 
narrowly oblanceolate-spatulate, 6 cm. long or less, abruptly acuminate or 
acutish, attenuate to a slender petiole, entire; cauline leaves linear-oblanceolate 
to nearly linear, much reduced upward, numerous, acutish or acuminate, sessile, 
bright green, glabrous or thinly strigose; heads small, about 5 mm. broad, on 
long, naked, nearly glabrous, slender peduncles; bracts nearly equal, linear, 
acute, purplish, strigose; rays very narrow, about 50, 2.5 mm. long. 
Type in the U. S. National Herbarium, no. 690241, collected near the N Bar 
Ranch, August 2, 1900, by E. O. Wooton, 
ADDITIONAL SPECIMENS EXAMINED: Luna Valley, July 27, 1900, Wooton; north 
of Ramah, July 25, 1906, Wooton. 
This is clearly related to Frigeron fiagellaris, resembling that species in habit, 
but it is nearly glabrous and has smaller heads and more brightly colored rays. 
Eschenbachia tenuisecta (A. Gray) Wooton & Standley. 
Conyza coulteri tenuisecta A. Gray, Syn. Fl]. 17: 221. 1884. 
Very distinct from #. coulteri in its smaller and more numerous heads, and in 
its bipinnately parted leaves with very narrow segments. In EF. coulteri the 
leaves are mostly entire, but sometimes toothed or shallowly pinnatifid. 
Herrickia Wooton & Standley, gen. nov. 
Perennial herb with alternate, thick, rigid, toothed, sessile leaves; stems 
branched; heads solitary at the ends of the slender, leafy branches; rays 
purple; disk flowers perfect, tubular, yellow drying purplish, with short, nar- 
rowly ovate lobes; ray flowers pistillate; bracts of the involucre in several 
series, about equal, conspicuously keeled, with green, foliaceous tips and 
spinescent points, the outer bracts foliaceous and changing gradually into the 
proper leaves; receptacle convex, naked; style appendages lanceolate, acute ; 
achenes compressed, striate, glabrous; pappus simple, of numerous stout, simple, 
nearly equal, strongly barbellate bristles. 
The genus is named for the late Dr. C. L. Herrick, an enthusiastic and dis- 
tinguished scientist, for several years president of the University of New 
Mexico. Although chiefly interested in geology, he made large collections of 
plants in many parts of the State. 
Our plant seems not to agree with any of the published asteraceous genera. 
Doctor Gray, doubtless, would have placed it in the genus Aster, but to-day 
none would hold it congeneric with the typical representatives of that group. 
It is related to Xylorrhiza. The plants composing that genus, however, are 
mostly scapiform and have large heads with very different involucres and 
pubescent achenes. The rigid, spinulose teeth of the leaves of Herrickia are 
very characteristic. They give the plant a strange, xerophytic aspect strikingly 
like that of Perezia nana. 
Herrickia horrida Wooton & Standley, sp. nov. PLATE 50. 
Perennial with numerous slender, branched stems from a somewhat woody 
root; stems 30 cm, high or less, wiry, hirsute, glandular; leaves thick and 
