19. Youngia terminalis Babcock & Stebbins, Publ. Carnegie Inst. Washington. 484: 85. 1937.
大头黄鹌菜 da tou huang an cai
Herbs 20-50 cm tall, perennial, rosulate. Caudex with residues of old leaf bases. Stem very slender, erect, sparsely branched from middle third or higher, glabrous, almost leafless; branches arcuate. Rosette leaves obovate to oblanceolate, to 12 × 3 cm, undivided or lyrately pinnatifid, glabrous, base contracted or attenuate into a very long (to 9 cm) inconspicuously winged petiole-like portion, margin entire to coarsely sinuate-dentate; lateral lobes (if present) 1-4 pairs, triangular, small, apex obtuse; terminal lobe orbicular to ovate, base truncate to subsagittate, apex obtuse to acute. Stem leaves few, linear-lanceolate, reduced in size. Synflorescence laxly corymbiform, with few to several capitula. Capitula with 11-13 florets; peduncle slender to capillaceous, 1.5-12 cm. Involucre narrowly cylindric, 7-8 mm; outer phyllaries ovate, longest ca. 1.5 mm; inner phyllaries 8, adaxially finely appressed pubescent, midvein subapically somewhat crested or tuberculate, margin scarious, apex acute and white ciliate. Anther tube green. Style branches yellow upon drying. Achene dark brown, subfusiform to columnar, ca. 3 mm, ribs obscurely spiculate or muricate, apex attenuate. Pappus white, ca. 4 mm. Fl. and fr. Jul-Aug.
● Grasslands on mountain slopes; 1000-1800 m. W Sichuan (Kangding).
Youngia terminalis is only known from two late 19th century gatherings made by Soulié. The original material preserved at B was destroyed during WWII. No other material has been traced so far, and the above description is based on the original description and a photograph and drawings of the original material. It is apparently closely related to Y. henryi and perhaps only a form of the latter from shaded moist habitats. See also note under Y. kangdingensis.