PLANTS COLLECTED BY DR. GAMBEL. 177 
KE. rotiosuv. Rays narrow and very long. Achenium rather hirsute towards 
the summit. Corymb with about seven to nine heads. A true species of 
Erigeron. 
Has. Monterey, California. 
CH.ANACTIS. 
C. *pENupaTA. Biennial; glandularly pubescent; peduncles execedingly long; involucrum viscidly 
pubescent, rather tomentose; scales linear-lanceolate; ray-flowers irregular, expanded, shorter than 
the disk. 
Very nearly allied to C. lanosa, but with a distinct habit. Apparently a very 
large species, with nearly naked peduncles more than a foot long, occasionally only 
bearing only one or two simple leaves. The leaves are pinnately parted, on slender 
petioles, with three or four segments on a side. - Flowers yellow, rather large, the 
rays very evidently lobed. Achenia black, narrow fusiform, nearly glabrous, with a 
pappus of about four lanceolate slightly lacerate scales. 
Has. Pueblo de los Angeles, Upper California. 
DIETERIA. 
§. SiperAntuus. Involucrum hemispherical, the scales linear and acute; achenia 
obovoid and compressed, in the young state with numerous striatures, at length 
covered with a silky villus; pappus of several series of unequal scabrous bristles, the 
outer series shorter and more slender, (those in the ray, as in the rest of the genus, 
much shorter and less numerous.) Biennial or perennial, leaves pinnately lobed or 
incised ; the lobes ciliated or pointed with bristles, Receptacle fimbrillate or chaffy. 
Flowers of one color. 
D. spinutosa. Nurr. in Trans. Amer. Phil. Soc., 1. c. p. 301. Sideranthus 
spinulosus. NuTTALL in Fraser’s Catalogue, (1813.) Amellus? spinulosus. Pursu. 
Flor., v. ii. p. 564, (from the specimen which I gave to Mr. Lambert.) Torrey, 
Ann. Lye. N. York, ii. p. 213. Starkea? pinnata. Nutr. Gen. Am. ii. p. 169. 
Diplopappus pinnatifidus. Took. Flor. Bor. Amer. ii. p. 22. Aplopappus spinulosws. 
Decanp. v..p. 347. Torrey & Gray, Flor. Am. ii. 240. 
D. rupiginosa. Aplopappus rubiginosus. Torrey & Gray, Flor. Am. ii. p. 240. 
‘D. *cracitis. Biennial, erect ; stem pilose, branched above, the one-flowered slender branchlets forming 
a fastigiate corymb; lower leaves pilose, pinnatifid; the segments oblong, obtuse, upper leaves 
linear, simple and sessile, entire, or minutely toothed, strongly ciliated with slender white bristles, 
which terminate all the lobes of the leaves 3 Involucrum not viseid. 
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