Decaneuropsis eberhardtii (Gagnep.) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 120(3): 365. 2007.

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 64

Decaneuropsis eberhardtii (Gagnep.) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 120(3): 365. 2007.

Vernonia eberhardtii Gagnep., Bull. Mus. Natl. Hist. Nat.: 489. 1919.

Decaneuropsis eberhardtii Type. Vietnam, Tonkin, Eberhardt 4230 (holotype: P!). Fig. 7E .

Vernonia craibiana Kerr, Bull. Misc. Inform. Kew 1935: 328. 1935.

Decaneuropsis eberhardtii Type: Thailand, A.F.G. Kerr 9969 (holotype: K!, isotype: L!, isotype: P!).

Description.

Climbing or scandent shrubs. Stems sprawling, young branches inconspicuously ribbed, puberulous. Leaves 10-15 by 5-7 cm, elliptic or obovate, margin entire, apex acute, base cuneate, subcoriaceous; both surfaces puberulous with cylindrical hairs, lateral veins 5-7-paired; petioles up to 1 cm long. Capitulescences terminal and axillary, paniculate. Capitula campanulate, 10-15 mm long, pedunculate. Receptacle flat, 2-3 mm in diam., hairy. Involucres campanulate, in 4-5 series, 7-8 mm long, 4-5 mm in diam. Phyllaries imbricate, dark green or purple apically, margin piliferous, outer surface puberulous without glands; the outer and the middle ones ovate, acute or apiculate; the inner ones ovate or ovate-lanceolate, apex acute or obtuse. Florets 11-13; corollas funnelform, purple, glabrous; corolla tubes 5-5.5 mm long; corolla lobes 2-2.5 mm long. Anthers 3-3.5 mm long, apical appendage acute, base acute. Styles purple, 6-6.5 mm long, branches 4-5 mm long. Achenes turbinate, 2.5-3 mm long, 10-ribbed, covered with dense hairs. Pappus in 2 series of bristles, the inner ones 6-7 mm long, persistent.

Distribution.

Thailand: Mae Hong Son, Chiang Mai, Lampang, Phetchabun, Nakhon Ratchasima, Chaiyaphum, Kanchanaburi, Yala. Myanmar, Vietnam.

Specimens examined.

Thailand, Chaiyaphum, Chulabhorn Dam, 16°32.09'N, 101°38.93'E, 6 Nov 2007, S. Bunwong 384 (KKU, US); Mae Hong Son, Pai, 30 may 1977, T. Santisuk 1122 (BKF); Chiang Mai, Doi Sutep, 8 Apr 1992, J.F. Maxwell 92-129 (E, L); Doi Sutep, 21 Oct 1922, A.F.G. Kerr 6413 (K, P); Doi Chiangdao, 21 Mar 1956, H.B.G. Garrett 1483 (K, L, P); Lampang, Jae Son, 29 Mar 1996, J.F. Maxwell 96-466 (BKF); Jae Son, 1 Feb 1997, J.F. Maxwell 97-101 (BKF); Phetchabun, Nam Nao national park, 26 Dec 2007, S. Bunwong 376 (KKU, US); Nakhon Ratchasima, Kao Lem, 27 Dec 1980, Put 3553 (BK, BM, E, K, P); Kao Lem, 17 Dec 1962, C. Phengklai 562 (BKF); Chaiyaphum, 20 Dec 1971, C.F. van Beusekom, C. Phengklai, R. Geesink & B. Wongwan 4459 (BKF, C, K, L); Kanchanaburi, Thong Pha Phume, 10 Jan 1985, H. Koyama, F. Konta & W. Nanakorn T-48974 (BKF); Thong Pha Phume, 14 Nov 1971, C.F. van Beusekom, C. Phengklai, R. Geesink & B. Wongwan 3774 (BKF, C, K, L, P); Yala, Banang Sata, Tal To waterfall, 10 Dec 1966, B. Sangkhachand 3064 (BKF).

Diagnostic characters.

Decaneuropsis eberhardtii differs from Decaneuropsis cumingiana by having white hairs on leaves and phyllaries.

Ecology.

Dry evergreen forest, alt. 500-800 m; flowering December to February.

Vernacular name.

Ya Kaa Krua (ยาแก้เครือ).

Figures

Figure 7. Morphology of Vernonieae in Thailand 3. A Cyanthillium cinereum B Cyanthillium montanum C Cyanthillium patulum D Decaneuropsis cumingiana E Decaneuropsis eberhardtii F Decaneuropsis garrettiana.