朝鲜苍术 chao xian cang shu

Atractylis koreana Nakai, Bot. Mag. (Tokyo) 42: 478. 1928; A. amplexicaulis Nakai ex T. Mori (1923), not Poiret (1804).

Herbs 25-50 cm tall. Rhizome long, stout. Stems solitary or tufted, unbranched or apically branched, glabrous. Leaves ± thickly papery, green, subconcolorous, glabrous, undivided, apex acuminate to subacute. Basal and lowermost cauline leaves withered at anthesis. Lower and middle cauline leaves ± narrowly elliptic to ovate-lanceolate, 3.5-10 × 2-4 cm, base rounded and semiamplexicaul. Upper cauline leaves similar but smaller. Capitula 1 to several. Involucre campanulate to obconic-campanulate, ca. 1 cm in diam. Phyllaries imbricate, abaxially glabrous, apex obtuse to rounded; outer phyllaries ovate, 2-4 × 1-2 mm; middle phyllaries gradually longer; innermost phyllaries ± narrowly oblanceolate, ca. 11 × 4 mm. Corolla white, ca. 8 mm. Achene obovoid, ca. 4 mm. Pappus brown, 6-7 mm. Fl. and fr. Jul-Aug.

Thickets, dry slopes; 200-700 m. Liaoning, Shandong [Korea].