Chaenactis glabriuscula DC.

Chaenactis glabriuscula DC. Prodr. 5: 659. 1836
Chaenactis glabriuscula megacephala A. Gray, in Terr. Pacif. R. R. Rep. 4: 104. 1857.
A leafy annual; stem 1.5-5 dm. high, commonly branched above; branches ascending; leaves once or twice pinnately divided into linear lobes or the upper entire, 5-10 cm. long, thinly floccose, in age glabrate; peduncles 3-8 cm. long; involucre 8-10 mm. high, 10-15 mm. broad; bracts 15-18, broadly linear or oblong, obtuse, thinly floccose; corollas yellow, pubescent, the central ones about 6 mm. long, the marginal with ampliate palmate limb, 4—5 mm. long; achenes about 5 mm. long, hirsute; squamellae of the central flowers linear-lanceolate, acute, nearly as long as the corollas, those of the marginal flowers usually less than half as long and obtuse.
Type locality: California.
Distribution: Washington to southern California.

Chaenactis tenuifolia Nutt. Trans. Am. Phil. Soc. II. 7: 375
1841.
Chaenactis filifolia Harv. & Gray; A. Gray, Mem. Am. Acad. II. 4: 98. 1849. Chaenactis glabriuscula tenuifolia H. M. Hall, Univ. Calif. Publ. Bot. 3: 191. 1907.
A slender winter annual; stem simple up to the inflorescence, sparingly floccose; leaves 4—6 cm. long, bipinnatifid into linear-filiform divisions; peduncles 1-5 cm. long; involucre 5-6 mm. high, 8-10 mm. broad; bracts 20-25, narrowly linear, acute, rather thick, floccose as well as glandular-granuliferous; corollas yellow, the central ones about 5 mm. long, those of the margin somewhat enlarged, with obliquely funnelform, 5-lobed limb; squamellae lanceolate to ovate, acute or obtuse, those of the central flowers 3-4 mm. long, those of the marginal ones much shorter (C filifolia is a slender form with shorter pappus).
Type locality: St. Diego, California.
Distribution: Southern California and Lower California. ■

Chaenactis aurea Greene, sp. nov
An annual; stem branched at the base, with ascending branches, about 2 dm. high, more or less floccose and purple-tinged ; leaves alternate, 3-5 cm. long, pinnatifid with linear, entire or cleft divisions, usually decidedly floccose; heads at the ends of branches 3-6 cm. long; involucre broadly turbinate, about 8 mm. high and 10 mm. broad; corollas golden-yellow, 5 mm. long, the marginal ones only slightly enlarged and oblique; achenes 4.5 mm. long, appressed-hirsute ; squamellae lanceolate, unequal, 3-5 mm. long.
Type collected on Wilson's Peak, California, 1901, Le Roy Abrams 1890 (herb. E. L. Greene). Distribution: Southern California.