光滑厚喙菊 guang hua hou hui ju

Dubyaea grandis Handel-Mazzetti.

Herbs 40-60 cm tall, perennial, with a taproot. Stem erect, glabrous, apically sparsely branched, leafy. Leaves glabrous. Basal and lower stem leaves oblanceolate to obovate, 20-24 × 6-8 cm, sinuate-dentate to pinnatipartite with triangular lobes, glabrous, basally attenuate to an auriculately clasping base, margin sparsely mucronulate-dentate, apex acute to acuminate. Middle stem leaves similar to lower stem leaves but smaller and rather more sinuate-dentate than shallowly pinnatifid, less attenuate toward base and broadly auriculately clasping. Synflorescence very laxly corymbiform, with 2-4 capitula. Capitula nodding, with numerous florets; peduncle 7-22 cm, stout. Involucre broadly campanulate, 1.8-2 × 1.5-2 cm. Phyllaries abaxially dark green and glabrous, apex acute; outer phyllaries ovate to triangular-ovate, largest 4-6 × 2-3 mm; inner phyllaries with margin and apex shortly brownish fimbriate. Florets blue to purple. Achene brownish, ca. 3.5 mm, apex truncate. Pappus yellowish to pale brownish, 9-10 mm. Fl. Jun-Jul.

● Forest margins; 900-1300 m. Sichuan.