AND GENERA OF PLANTS. 381 
ray two. Four to six inches high, nearly smooth, except the young shoots and involucrum. 
Receptaculum conic. ; 
Burrielia * parviflora; somewhat pubescent; very much branched and many- 
flowered; leaves long and almost filiform; rays and sepals about eight; rays 
oblong, very short; achenium minutely scabrous. ; 
Has. With the above. Leaves scarcely a quarter of a line wide. Stem much branched from 
the base; peduncles slender and very Jong. Involucrum smooth, divisions lanceolate. Receptacle 
conic, Pappus three or four-leaved, long-awned, in the ray two-leaved and similar. Oss. In all 
these species the discal florets are campanulate with a narrow tube, the border with five acute 
erect teeth, scarcely, if at all, pubescent. 
§. 1. * AMPHIACHANIA.—Pappus none. 
Burrieha * hirsuta; erect, hirsute; leaves very long, linear and acute, some- 
times here and there incise; peduncles elongated; sepals and rays ten to twelve; 
rays oval, as long as the disk. 
Has. St. Barbara, Upper California, Achenia compressed and scabrous. Six to twelve inches 
high, below smooth, with the radical leaves very narrow. Stem leaves, about two inches long, 
and a line wide. Scarcely distinguishable from B, gracilis, except by the absence of pappus. 
* PTILOMERIS. 3 ? 
Capitulum heterogamous, many-flowered; rays feminine, elongated, slightly 
three-toothed. Involucrum subcampanulate, many-leaved, in nearly a sim- 
_ ple series, (fon to fifteen.) Sepals lanceolate, embracing the radial ache- 
ele conic, naked or villous. Achenium slenderly conic, an- 
gular, hirsute, attenuated at base. Pappus extremely various, many-leaved, 
paleaceous, (eight to twelve,) or none! apex awned or obtuse, fimbriate; in 
the ray smaller, formed simply of a short, multifid crown, or with the addi- 
tion of one or two awns. Discal florets hermaphrodite, campanulate, five- 
toothed, externally, as well as the tube, glandularly pubescent. Stigma ob- 
tuse, short, reflected, and pubescent.—Annual herbs of California; much 
branched; leaves opposite, once or twice pinnatifid with long, capillary seg- 
ments; flowers terminal, pedicellate, golden yellow. The whole plant 
clothed with a slender, soft, glandular pubescence, which is aromatic. Al- 
vil.—4 V 
