Acilepis doichangensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 140. 2009.

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 37

Acilepis doichangensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 140. 2009.

Vernonia doichangensis H.Koyama, Bull. Natl. Sci. Mus. Tokyo, Ser. B 30(1): 22. 2004.

Type.

Thailand, Chiang Mai, Mae Taeng Diatrict, Doi Chang, T. Shimizu, H. Toyokuni, H. Koyama, T. Yahara & T. Santisuk T-20693 (holotype: KYO!).

Description.

Robust herbs, rhizomatous, 0.5-2 m tall. Stems erect, conspicuously ribbed, puberulose. Leaves 7-15 by 2-6 cm, elliptic or oblanceolate, margin subentire or remotely serrulate, apex acute or acuminate, base cuneate, subcoriaceous; both surfaces scabrous with hairs and capitate glands; lateral veins 8-10-paired; petioles up to 5 mm long. Capitulescences terminal and axillary, paniculate. Capitula campanulate, subsessile or pedunculate. Receptacle flat, glabrous. Involucres narrowly campanulate, in 5-6 series, 10-12 mm long, herbaceous. Phyllary margins piliferous, outer surface tomentose, glandular; the outer and the middle ones ovate, acuminate; the inner ones lanceolate to oblong, apex acute. Florets ca. 35; corollas funnelform, purple, glandular; corolla tubes 4-5 mm long; corolla lobes 4-5 mm long. Achenes oblong, ca. 5 mm long, 10-ribbed, glabrous. Pappus bristles, the inner ones ca. 8 mm long.

Distribution.

Thailand: Chiang Mai. Endemic.

Specimens examined.

Thailand. Chiang Mai, Mae Taeng Diatrict, Doi Chang, 19°7.32'N, 98°56.60'E, 17 Oct 1979, T. Shimitzu, H. Toyokuni, H. Koyama, T. Yahara & T. Santisuk T-19059 (KYO); Doi Chang, 24 Oct 1979, T. Shimitzu, H. Toyokuni, H. Koyama, T. Yahara & T. Santisuk T-20678 (KYO); Doi Chang, 24 Oct 1979, T. Shimitzu, H. Toyokuni, H. Koyama, T. Yahara & T. Santisuk T-20693 (KYO).

Ecology.

Hill evergreen forest, alt. 1000-1300 m; flowering September to January.

Diagnostic characters.

Acilepis doichangensis is distinguished from Acilepis attenuata and Acilepis silhetensis by its tomentose involucre and glabrous achenes.

Vernacular names.

Dok See Pa (ดอกสีป่า), DoK Doi Pa (ดอกดอยป่า).