Camchaya tenuiflora Kerr, Bull. Misc. Inform., Kew. 1935: 327. 1935.

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 56

Camchaya tenuiflora Kerr, Bull. Misc. Inform., Kew. 1935: 327. 1935.

Type.

Thailand, Bangkok, A.F.G. Kerr 20563 (holotype: BK!, isotype: E!, isotype: K!, isotype: L!, isotype: P!). Fig. 6G .

Description.

Annual herbs, 20-70 cm tall. Stems erect, terete, inconspicuously ribbed, scabrous with uniseriate and T-shaped hairs. Leaves alternate, ovate or lanceolate, 3-10 by 1.5-2.5 cm, margin serrate, apex acute, base attenuate, chartaceous; both surfaces scabrous with whip-shaped hairs, cylindrical hairs and capitate glands; lateral veins 5-10-paired; petioles up to 10 mm long. Capitulescences terminal and axillary, paniculate and solitary. Capitula campanulate, 8-10 mm long, pedunculate. Receptacle convex, 1.5-3 mm in diam., glabrous. Involucres campanulate, in 6-7 series, 8-9 mm long, 6-10 mm in diam. Phyllaries imbricate, light green with purple apex, margin with spines up to 5 mm long, outer surface arachnoid glandular; the outer and the middle ones lanceolate, apex spinose; the inner ones lanceolate to oblong apex acuminate. Florets 40-60; corollas funnelform, purple or white, puberulous, glands capitate; corolla tubes 4-6 mm long; corolla lobes 1.5-2.5 mm long. Anthers ca. 2 mm long, apical appendage acute, base rounded. Styles purple, 4-7 mm long, branches 1.5-1.7 mm long. Achenes obovate, 1.5-1.7 mm long, glabrous, 10-ribbed. Pappus in 1 series of bristles, 1-4 mm long, present in some florets, deciduous.

Distribution.

Thailand: Chiang Mai, Chiang Rai, Loei, Chaiyaphum, Nakhon Ratchasima. Endemic.

Specimens examined.

Thailand, Loei, Nahaew, Phu Suan Sai national park, 17°30.21'N, 100°56.35'E, 6 Nov 2007, S. Bunwong 348 (KKU, US); Phu Suan Sai national park, R. Pooma 1231 (BKF); Chiang Rai, Wieng Pa Pao, 26 Oct 1997, J.F.Maxwell 197-1215 (BKF); Nakhon Ratchasima, Bua Yai, 1 Nov 1931, Put 4264 (BK, E, K, P).

Diagnostic characters.

Camchaya tenuiflora differs from Camchaya loloana by its longer marginal spine on phyllaries and leaf surfaces without T-shaped hair.

Ecology.

Open area in evergreen forest, alt. 700 m; flowering October to December.

Vernacular name.

Phu Ra Wee (พู่ระวี).

Figures

Figure 6. Morphology of Vernonieae in Thailand 2. A Camchaya gracilis B Camchaya loloana C Camchaya loloana var. mukdahanensis D Camchaya pentagona E-F Camchaya spinulifera G Camchaya tenuiflora H-I Camchaya thailandica.