Revisions and key to the Vernonieae (Compositae) of Thailand Author Bunwong, Sukhonthip Maejo University Phrae Campus, Mae Sai, Rong Kwang, Phrae 54140, Thailand Author Chantaranothai, Pranom Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand Author Keeley, Sterling C. Department of Botany, University of Hawaii, Honolulu, HI 96816 USA text PhytoKeys 2014 2014-05-13 37 25 101 http://dx.doi.org/10.3897/phytokeys.37.6499 journal article http://dx.doi.org/10.3897/phytokeys.37.6499 1314-2003-37-25 FFE8FFACFF84FFA95573FFFECD03F742 576215 Acilepis chiangdaoensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 140. 2009. Vernonia chiangdaoensis H.Koyama, Bull. Natl. Sci. Mus. Tokyo, Ser. B 31(2): 69. 2005. Type. Thailand, Chiang Mai, Doi Chiangdao, M. Tagawa, K. Iwatsuki & N. Fukuoka T-4038 (holotype: KYO!). Description. Perennial herbs, 1-2 m tall. Stems erect, conspicuously ribbed, villose. Leaves 10-30 by 4-10 cm, lanceolate, margin serrate, apex acuminate, base attenuate, subcoriaceous, upper surface scabrous and without glands; lower surface scabrous with whip-shaped hairs, cylindrical hairs and capitate glands; lateral veins 7-10-paired; petioles up to 3 cm long. Capitulescences terminal, paniculate. Capitula campanulate, 10-12 mm long, pedunculate. Receptacle flat, 2-2.5 mm in diam., pubescent. Involucres campanulate in 4-5 series, 8-10 mm long, scarious.Phyllaries imbricate, green or purple apically, margin piliferous, outer surface villose, glands capitate; the outer and the middle ones lanceolate, apex spinose; the inner lanceolate to oblong, apex acuminate. Florets 10-15, narrowly funnelform, purple or white, glandular; corolla tubes 4-5 mm long; corolla lobes 2.5-3 mm long. Anthers 2.5-2.8 mm long, apical appendage acute, base obtuse. Styles purple, 4.5-6 mm long, branches 2.5-3 mm long. Achenes subterete, 2.5-3.5 mm long, 10-ribbed, pubescent with twin hairs and capitate glands. Pappus bristles, the inner ones 6-6.5 mm. Distribution. Thailand. Endemic. Specimens examined. Thailand. Chiang Mai, Chiangdao wildlife sanctuary, 19°26.08'N , 98°53.76'E , S . Bunwong 77 (KKU, US); Doi Chiangdao, 3 Jan 1966, M. Tagawa, K. Iwatsuki & N. Fukuoka T-4038 (KYO); Chiang Mai, Doi Sutep national park, 22 Dec 1989, J.F. Maxwell 89-1585 (CMU, L); Chiang Mai, Maerim, W. Nanakorn et al. 10191 (QBG); Wang Tao, Th. Sorensen , K. Larsen & B. Hansen 1073 (BKF, C, K). Ecology. Mixed deciduous or pine-oak forest, alt. 600-800 m; flowering December to February. Diagnostic characters. Large leaves and scarious spinose apical phyllaries. Vernacular name. Dok See Pa (ดอกสีป่า), DoK Doi Pa (ดอกดอยป่า).