Doronicum micranthum (Asteraceae, Senecioneae): a distinct new species from western Qinling, China

<i>Doronicum micranthum</i> (Asteraceae, Senecioneae), a new species from Hui County and Liangdang County in southeastern Gansu Province, China, is described and illustrated. This species is closely related to <i>D. stenoglossum</i> Maxim. and <i>D. conaense</i> Y.L.Chen, with which it shares the following characters: the ray florets are equal to or shorter than the involucre, and the small capitula are arranged in racemes at the stem apex. It differs by having swollen (vs. not swollen) rhizomes, smaller capitula (0.5-1.4 vs. 2-2.5 cm in diameter), and all florets' achenes that are glabrous and lack a pappus (vs. achenes in all florets puberulent, pappus present, or glabrous and without pappus in ray florets, densely pubescent and bearing a pappus in disk florets).