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

16. Youngia prattii (Babcock) Babcock & Stebbins, Publ. Carnegie Inst. Washington. 484: 81. 1937.

川西黄鹌菜 chuan xi huang an cai

Crepis prattii Babcock, Univ. Calif. Publ. Bot. 14: 331. 1928.

Herbs 15-60 cm tall, perennial, ± rosulate. Caudex with residues of old leaf bases. Stem solitary, ± slender, erect, branched from middle, glabrous, distantly sparsely leafy. Rosette leaves and lower stem leaves oblanceolate to narrowly elliptic, 5-13 × 1-3 cm, lyrately or runcinately pinnatifid to pinnatisect, glabrous, base attenuate into a ± winged petiole-like portion, margin subentire to sinuate-dentate; lateral lobes 3-6 pairs, opposite to obliquely opposite, ovate, triangular, linear-lanceolate, or falcate, central ones largest and others gradually smaller, lowermost ones usually toothlike; terminal lobe broadly triangular, linear-lanceolate, or narrowly linear, apex obtuse, acute, or long acuminate. Middle and upper stem leaves similar to lower stem leaves or reduced in size and undivided. Synflorescence corymbiform, with few to many capitula. Capitula with 9-12 florets; peduncle usually 0.5-3 cm, very slender. Involucre narrowly cylindric, 7-9 mm, to 1.1 cm in fruit. Phyllaries abaxially glabrous; outer phyllaries ovate, longest 1-2 mm, apex obtuse; inner phyllaries ca. 8, adaxially pubescent with appressed hairs, midvein subapically plane, margin scarious, apex obtuse to acute. Anther tube dark green. Style branches ± yellow upon drying. Achene brown, subfusiform to columnar, 2.5-3 mm, ribs finely spiculate, apex attenuate. Pappus white, 4-5 mm. Fl. and fr. Jun-Sep.

● Thickets or grasslands on mountain slopes; 1500-2700 m. Henan, Hubei, ?Shanxi, Sichuan.

See note under Youngia kangdingensis.


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