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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Youngia

6. Youngia sericea C. Shih, Komarovia. 5: 48. 2007.

绢毛黄鹌菜 juan mao huang an cai

Pseudoyoungia sericea (C. Shih) D. Maity & Maiti; Tibetoseris sericea (C. Shih) Sennikov.

Herbs 3-6 cm tall, perennial, rosulate, subacaulescent. Taproot and lateral shoot-bearing roots giving rise to secondary rosette shoots. Caudex short, unbranched or weakly branched, with residues of old leaf bases. Rosette leaves oblanceolate to narrowly elliptic, 2-5 × 0.4-1.5 cm, pinnatipartite, base attenuate into a petiole-like portion; lateral lobes 4 or 5 pairs, opposite to obliquely opposite, narrowly triangular, basally broadly falcate; terminal lobe narrowly elliptic, elliptic-triangular, or orbicular, apex acute, obtuse, or rounded. Capitula 3-9, clustered, directly from axils of rosette leaves or on a stalk, with 9-15 florets; stalk capillaceous, short, branched; peduncle capillaceous, 1-3 cm, arachnoid hairy to tomentose, ± bracteate. Involucre cylindric, ca. 1 cm. Phyllaries dark green in fruit, arachnoid hairy; outer phyllaries narrowly ovate to lanceolate, longest ca. 1/3 of inner ones, apex obtuse to acute; inner phyllaries ca. 8, adaxially glabrous, margin broadly white membranous, apex acute to obtuse. Achene dark brown to blackish, subfusiform, 3.5-4 mm, apex truncate. Pappus white, ca. 6 mm, persistent. Fl. and fr. Jun-Sep.

● Gravelly mountain slopes, rocky slopes; 3300-3400 m. SE Xizang (Zayü).

From the place of its first publication (C. Shih, Acta Phytotax. Sin. 33: 185. 1995), the name Youngia sericea was not validly published because two specimens of different gatherings were simultaneously designated as types (see Vienna Code, Art. 37.1 and 37.2). The name was validated with its original authorship in a nomenclatural note by Sennikov in 2007, as given above.


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