12. Youngia mairei (H. Léveillé) Babcock & Stebbins, Publ. Carnegie Inst. Washington. 484: 77. 1937.
东川黄鹌菜 dong chuan huang an cai
Crepis mairei H. Léveillé, Repert. Spec. Nov. Regni Veg. 12: 531. 1913.
Herbs 15-25 cm tall, perennial, rosulate. Taproot slender. Caudex with residues of old leaf bases. Stem solitary, slender, erect, branched from middle third or higher, glabrous. Rosette leaves oblanceolate, 3-7 × 1-1.5 cm, undivided, both faces finely pubescent with yellow or brown many-celled hairs, base attenuate into a short petiole-like portion, margin mucronately sinuate-dentate, apex acute to acuminate. Stem leaves few, linear, reduced in size. Synflorescence corymbiform, with few to several capitula. Capitula with ca. 12 florets; peduncle capillaceous, 0.5-1.2 cm, ± subtomentulose. Involucre cylindric to narrowly campanulate, 6-7 mm, abaxially glabrous. Outer phyllaries ovate, longest ca. 1 mm; inner phyllaries 8, adaxially pubescent with very shortly appressed shiny hairs, midvein subapically often somewhat crested, margin ± white scarious, apex acute and ciliate. Anther tube and style branches yellow upon drying. Achene brownish purple, columnar, ca. 2.5 mm, ribs finely spiculate, apically subattenuate. Pappus white, 3.5-4 mm. Fl. Jun.
● Among rocks; ca. 2600 m. Yunnan.
Youngia mairei is only known from the type collection made in 1912 and is close to Y. lanata and Y. fusca.