Decaneuropsis cumingiana (Benth.) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 120(3): 364. 2007.

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 63

Decaneuropsis cumingiana (Benth.) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 120(3): 364. 2007.

Vernonia cumingiana Benth. in Hook.f., Kew J. 4: 232. 1852.

Decaneuropsis cumingiana Type. Philippines, M. Cuming 1092 (holotype: G!). Fig. 7D .

Vernonia sangka Kerr, Bull. Misc. Inform. Kew 1935: 329. 1935.

Decaneuropsis cumingiana Type: Thailand, Kanchanaburu, Sangka, A.F.G. Kerr 8302 (holotype: K!).

Description.

Climbing or scandent shrubs, 3-10 m tall. Stems sprawling, young branches rounded, inconspicuously ribbed, ferruginous tomentose. Leaves 7-10 by 3-4 cm, elliptic to oblong-elliptic, margin entire, apex acute, base cuneate, subcoriaceous; upper surfaces puberulous with glands, lower surface sericeous with whip-shaped hairs, cylindrical hairs and capitate glands; lateral veins 5-6-paired; petioles up to 1 cm long. Capitulescences terminal and axillary, paniculate. Capitula campanulate, 12-15 mm long, pedunculate. Receptacle flat, 4-4.5 mm in diam., hairy. Involucres campanulate, in 5-6 series, 7-8 mm long, 6-7 mm in diam. Phyllaries imbricate, dull green, margin piliferous, outer surface ferruginous tomentose, glands capitate; the outer and the middle ones ovate, apex acute; the inner ones lanceolate to oblong, apex acute. Florets 20-30; corollas funnelform, purple, glandular, corolla tubes 5-6.5 mm long; corolla lobes ca. 2 mm long. Anthers 2.8-3 mm long, apical appendage acute, base obtuse. Styles purple, 7-7.5 mm long, branches 3.5-4 mm long. Achenes clavate, 3-3.5 mm long, 10-ribbed, puberulous without glands. Pappus in 2 series of bristles, the outer ones are shorter than the inner ones, the inner ones 9-9.5 mm long, persistent.

Distribution.

Thailand: Chiang Mai, Nan, Lampang, Phetchabun, Kanchanaburi, Phra Nakhon Si Ayutthaya, Saraburi, Nakhon Nayok, Yala. Hong Kong, India, Laos, Myanmar, Vietnam, Philippines, New Guinea.

Specimens examined.

Thailand, Phetchabun, Nam Nao national park, 16°44.29'N, 101°34.19'E, 18 Mar 2003, S. Bunwong 74 (KKU); Chiang Mai, Doi Sutep,15 Apr 1910, A.F.G. Kerr 1114 (BK, BM, K); Doi Sutep, 16 Feb 1958, Th. Sørensen, K. Larsen & B. Hansen 6942 (C, K); Lampang, 6 Mar 2525, Winit 1287 (BK, BKF, K), 31 Mar 1930, Winit 1916 (K); Saraburi, Mauk Lek, 9 Nov 1924, A. Marcan 1844 (BK, BM, K); Yala, Banang Sata, 10 Dec 1966, B. Sangkhachand 1409 (BKF).

Diagnostic characters.

Decaneuropsis cumingiana is recognized by its ferruginous pubescence on the leaves and phyllaries.

Ecology.

Evergreen or pine-oak forest, alt. 200-850 m; flowering November to April.

Vernacular name.

Phaya Rak Pa (พญารักป่า), Pan Sieng (พันเซียง).

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.