AND GENERA OF PLANTS. 375 
pubescent, with a thick, obtuse extremity, ending in a minute cone. Achenium shomae and striate, 
covered loosely with long, soft hairs; pappus scales white, lacerated, obtuse, about twenty, 
exserted beyond the down.—Nearly allied to Chamnactis, but with the florets all regulat 
CHANACTIS. (Decan 
Capitulum many-flowered, homogamous; florets Stetbalal, funnelform, the ex- 
ternal series with the border dilated, ringent or palmate, five-cleft or five- 
toothed, with the tube smooth and the dentures pubescent. Involucrum 
campanulate, composed of two series of erect, linear sepals, (twenty to thirty,) 
not membranaceous (or scarcely so) on the margin. Receptacle naked, al- 
veolate, the margin sometimes paleaceous, the paleew similar with the invo- 
jucrum. Branches of the style hirsute, subulate, (without the conic apex.) 
Achenia linear-tetragonal, attenuated almost into a pedicel at the base, pu- 
bescent with appressed hairs. Pappus of four or five? lanceolate, acute, 
membranaceous palez, in the ray shorter and obtuse.—Californian annuals, 
with the habit of Hymenopappus. Leaves alternate, pinnately divided, with 
narrow, entire, linear lobes; branches often naked at the summit, monoce- 
phalous. Flowers yellow. Anthers naked at base. 
Chenactis * tenuifolia; annual or biennial ; at length smooth, much branched, 
flowers fastigiate; leaves bipinnately dissected, segments narrow-linear, or 
linear-oblong; rays funnel-formed, expanding longer than the disk; achenium 
nearly smooth; pappus four-leaved; sepals pubescent, linear, acute; margigof 
the receptacle paleaceous. 
Has. St. Diego, Upper California. Flowering in May. About a foot high. Leaves very si- 
milar to those of Hymenopappus filifolius, alternate, the young shoots a little tomentose. Involu- 
crum hemispherical, many-flowered, somewhat viscid; pedicels rather short. Style hirsute, subu- 
late. Florets minutely pubescent; the flowers bright yellow. Stem about a foot high. Pappus 
of the rays shorter and obtuse.—Nearly allied to C. glabriuscula, but the rays are not palmatifid. 
In this species the margin of the receptacle is foliaceous, the radial florets being situated between 
the outer and inner series of the sepals. 
Chenactis Stevioides; (HookER and ARNOTT.) 
Has. In the Snake country. The rays palmatifid. Pappus four-leaved. Achenium four-an- 
gled, nearly smooth.—A slender, few-flowered annual. Sepals ee oleic, peaty smooth, 
about fifteen. Very nearly sg to the Ve orn Flowers yellow? * 
