泰国斑鸠菊 tai guo ban jiu ju

Acilepis doichangensis (H. Koyama) H. Robinson & Skvarla.

Herbs, perennial, 0.5-2 m tall. Rootstock a woody rhizome. Stems erect, branched above, terete, finely striate, shortly pubescent throughout. Petiole to 5 mm; leaf blade elliptic to oblanceolate, 7-15 × 2-5.5 cm, abaxially shortly pubescent, adaxially sparsely scaberulous, both surfaces gland-dotted, base cuneate, margin subentire or remotely serrulate, apex acute or acuminate; upper leaves gradually smaller. Synflorescences terminal and axillary, thyrselike, panicles small, relatively long pedunculate, axillary ones narrowly divergent from main axis. Capitula to 5, clustered at tips of branches, ca. 20 mm in diam.; peduncle to 15 mm, shortly pubescent. Involucre narrowly campanulate, ca. 12 × 20 mm; phyllaries ca. 6-seriate, outer ovate, apex acuminate, spreading, often shortly recurved, inner lanceolate, lanate, gland-dotted toward apex, apex acute. Receptacle alveolate, glabrous. Florets ca. 35; corolla reddish- or purplish violet, lilac, or purple, ca. 10 mm, gland-dotted lobes ca. 5 mm. Achenes pale brown, cylindric, ca. 5 mm, 10-ribbed, glabrous. Pappus 2-seriate, straw-colored; outer setae few, 1.5-3 mm, caducous; inner setae ca. 8 mm. 2n = 54.

Yunnan [Thailand].

In his protologue, H. Koyama cited a collection from China for this species (Yunnan: Tien-sin, Maire s.n. (P)), but that specimen has not been seen by the present authors.