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336 DESCRIPTIONS OF NEW SPECIES 
immediately seated upon the uppermost leaf; involucrum small and ovate, composed of two rows 
of ovate, acuminate sepals, the tips somewhat herbaceous and projecting. Rays oblong, about 
eight, feminine, slightly three-toothed, longer than the narrow disk; discal florets tubular, cyathi- 
form, the summit five-cleft. Stigma lanceolate, pubescent; achenium narrow, slightly agp 
when mature, linear-subcylindric? Pappus short, scanty, scabrous, brownish. 
‘ *PENTACHETA. 
” Capitulum heterogamous, many-flowered, hemispherical. Rays feminine in 
two or three series, oblong. Discal florets tubular, oblique, ringent and five- 
cleft at the summit, Re eptacle. punctate, naked, convex. Involucrum 
loosely imbricate; scales lines 
, flat, acute, with broad membranaceous mar- 
gins, in two or three series. Achenium turbinate, angular, hirsute; pappus 
consisting, in ray and disk, of five scabrous bristles, united at the base, which 
is not deciduous.—A small and slender annual of Upper California, bran h- 
ing from the base, branches divaricate, one-flowered, fastigiate. Leavy es s al- 
-ternate, entire, nearly glabrous and filiform. Flowers wholly bright yellow 
the rays slightly three-toothed. —(The name alludes: “to the pappus oP Rie 
bristles. ip 
ar 
pe on 
Pentacheta aurea. ; 
Has, In dry plains near the sea, in the vicinity of St. Diego, Up] er | 
ifornia. Flowering in 
xe inches to a foot high, branch- 
ing usually from the base in an umbellate manner, the branches one-flowered. Leaves, on their 
margin, as well as the upper part of the stem, somewhat sparingly pilose, the hairs rather long and 
soft. Flower about the size of a Daisy, almost orange-yellow, with twenty to fifty rays, much 
that of the true Aplopappuss, the scales exactly similar with 
each ‘othe: linearfanceolite: id sharply acuminate, membr. s, and ~ ragga laeerate on the 
- margin, the centre green and one-nerved, Anthers without sete at ba 
curved and ringent, or a Enea cleft above. Stigmas rare Mae 
April. A very elegant, though often minute plant, from two or 1 
ly, allied to Chatopappa, but is wholly distinct from all the other: eae with 
— to the ge the ee 
