湿生狗舌草 shi sheng gou she cao

Othonna palustris Linnaeus, Sp. Pl. 2: 924. 1753; Cineraria congesta R. Brown; C. palustris (Linnaeus) Linnaeus; Senecio arcticus Ruprecht; S. congestus (R. Brown) Candolle; S. gracillimus C. Winkler; S. palustris (Linnaeus) Hooker (1834), not Vellozo (1831); S. palustris var. congestus (R. Brown) Hooker; Tephroseris palustris subsp. congesta (R. Brown) Holub.

Herbs, biennial or annual, with numerous fibrous roots. Stem solitary, erect, 20-60 cm tall, hollow, glandular pubescent at upper part, leafy. Radical leaves petiolate, withered by anthesis; lower stem leaves petiolate; median stem leaves sessile, oblong or oblong-lanceolate or lanceolate-linear, 5-15 × 0.7-1.8 cm, papery, both surfaces glandular pubescent, rarely glabrous, base subamplexicaul, margin coarsely sinuate-serrate to repand-dentate or rarely entire, apex obtuse. Capitula radiate, few to many arranged in dense to lax terminal corymbs; peduncles densely glandular pubescent. Involucres campanulate, 5-7 × 5-7 mm, not calyculate; phyllaries 18-20, green, lanceolate, herbaceous, with membranous margin, sparsely glandular, apically acuminate. Ray florets 20-25; corolla tube 3-3.5 mm; lamina pale yellow, elliptic-oblong, ca. 5.5 × 2.5 mm, apically obtuse, 2- or 3-denticulate or entire. Disk florets many; corolla yellow, ca. 5 mm, with ca. 2.5 mm tube and funnelform limb; lobes ovate-lanceolate, apically acute, papillose. Anthers ca. 1.2 mm, basally obtuse, appendages ovate-lanceolate. Achenes cylindric, ca. 2.5 mm, glabrous. Pappus copious, white, 3-3.5 mm at anthesis, 12-13 mm in fruit. Fl. Jun-Aug.

Wet places; 600-1000 m. Hebei, Heilongjiang, Nei Mongol [circumboreal (except Greenland and most of NW Europe)].