Acilepis pseudosutepensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 143. 2009.

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 43

Acilepis pseudosutepensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 143. 2009.

Vernonia pseudosutepensis H.Koyama, Bull. Natl. Sci. Mus. Tokyo, Ser. B 31(2): 74. 2005.

Type.

Thailand, Uthai Thani, Huay Ka Kaeng; J.F. Maxwell 76-94 (holotype: AAU!, isotype: L!).

Description.

Perennial herbs, 60-150 cm tall. Stems erect, conspicuously ribbed, sericeous. Leaves simple, alternate at base, 10-14 by 4-7 cm, ovate-lanceolate or elliptic, margin serrate, apex acuminate, base cuneate or acuminate, subcoriaceous; upper surface scabrous without glands; lower surface scabrous with whip-shaped hairs and capitate glands; lateral veins 9-11-paired; petioles up to 10 mm long. Capitulescences terminal and axillary, paniculate. Capitula campanulate, 10-15 mm long, pedunculate. Receptacle flat, 1.5-3 mm in diam., glabrous. Involucres narrowly campanulate, in 5-6 series, 8-10 mm long, 3-4 mm in diam., herbaceous. Phyllaries light green or purple apically, margin piliferous, outer surface densely arachnoid, capitate glands; the outer and the middle ones ovate or lanceolate, apex apiculate or aristate; the inner ones ovate-lanceolate to oblong, apex apiculate. Florets 10-15; corollas funnelform, purple, glandular; corolla tubes 7-8 mm long; corolla lobes 3-4 mm long. Anthers 3.5-4 mm long, apical appendage acute, base obtuse. Styles purple, 7-9 mm long, branches 3-3.5 mm long. Achenes subterete, 2-3.5 mm long, 10-ribbed, pubescent with twin hairs and capitate glands. Pappus bristles, the inner ones 6-7 mm long.

Distribution.

Thailand: Tak, Uthai Thani, Kanchanaburi. Endemic.

Specimens examined.

Thailand, Tak, Doi Hua Mod, 15°57.63'N, 98°51.43'E, 16 Feb 2008, S. Bunwong 388 (KKU, US); Doi Hua Mod, 18 Dec 1961, K. Larsen 8794 (C, L), K. Larsen 8990 (C, L); Tak, Maesod, 26 Jan 1985, Y. Paisooksantivatana 1558-85 (BK); Uthai Thani, Huay Kha Khang, 10 Feb 1976, J.F. Maxwell 76-94 (AAU, BK, L); Kanchanaburi, Sangklaburi, Thaung Yai Naresuan, 14 Jan 1994, J.F. Maxwell 94-41 (L); Kanchanaburi, Sai Yok, C. Phengklai 346 (BKF, L).

Diagnostic characters.

Acilepis pseudosutepensis is recognized by elongate peduncles, loose capitulescences, densely villose and scarious phyllaries.

Ecology.

Limestone mountain or mixed evergreen forest, alt. 200-400 m; flowering December to February.

Vernacular name.

Ka Ma Plong (กะม่าปล่อง).