Annuals, to 35 cm. Stems erect or sprawling, branched distally, glabrous. Leaves linear, 30-100 × 2-4(-6+) mm, (bases often connate and sheathing, apices blunt) margins entire, faces glabrous. Involucres hemispheric or campanulate, 5-7 mm. Phyllaries 5-10, ± lanceolate, hairy. Receptacles conic, papillate, glabrous. Ray florets 6-13; (corollas pale yellow) laminae ovate-elliptic, (0-)0.5-2 mm. Anther appendages oblong or obovate. Cypselae grayish, somewhat flattened, ± linear, to 4 mm, hairy; pappi of 5-10 subulate to lanceolate, often fimbriate, laciniate, or aristate scales. 2n = 10. Flowering Mar-Jul. Vernal pools, wet meadows; 0-900 m; B.C.; Calif., Oreg., Wash.