Acilepis namnaoensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 141. 2009.

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 39-40

Acilepis namnaoensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 141. 2009.

Acilepis namnaoensis Vernonia namnaoensis H.Koyama, Bull. Natl. Sci. Mus. Tokyo, Ser. B 30(1): 22. 2004.

Type.

Thailand, Phetchabun, Nam Nao national park, H. Koyama, H.Terao & Th. Wongprasert T-311840 (holotype: KYO!). Fig. 5C .

Description.

Perennial herbs, 1-2 m tall. Stems erect, conspicuously ribbed, villose. Leaves 15-20 by 5-8 cm, obovate or oblanceolate, margin serrate, apex acuminate, base cuneate, subcoriaceous; both surfaces scabrous with whip-shaped hairs and capitate glands; lateral veins 6-8-paired; petioles up to 10 mm long. Capitulescences terminal and axillary, paniculate. Capitula campanulate, 12-15 mm long, pedunculate. Receptacle flat, 2-2.5 mm in diam., hairy. Involucres campanulate, in 4-5 series, 7-8 mm long, 6-7 mm in diam., herbaceous. Phyllaries light green, margin piliferous, outer surface densely arachnoid, glands capitate; the outer and the middle ones ovate, apex spinose; the inner ones ovate-lanceolate, apex apiculate. Florets ca. 20; corollas funnelform, purple, glandular; corolla tubes ca. 5 mm long; corolla lobes ca. 3 mm long. Anthers yellowish, ca. 3 mm long, apical appendage acute, base acute. Styles purple, 5-8 mm long, branches 1.5-2.5 mm long. Achenes subterete, 3.5-4 mm long, 10-ribbed, covered with sparse hairs and glands. Pappus bristles, the inner ones 6-7 mm long.

Distribution.

Thailand: Phetchabun, Chaiyaphum. Endemic.

Specimens examined.

Thailand. Chaiyaphum, Chulabhon Dam, 16°32.10'N, 101°38.93'E, 8 Oct 2007, S. Bunwong 385 (KKU, US); Chulabhon Dam, 27 Dec 1982, H. Koyama, H.Terao & Th. Wongprasert T-311840 (KYO).

Ecology.

Dry dipterocarp or dry evergreen forest, alt. 800 m; flowering November to December.

Diagnostic characters.

Acilepis namnaoensis is characterized by its cup-shaped involucre and spinose phyllaries with whitish tomentum. Its specific epithet is derived from Nam Nao national park in Pethchabun province.

Vernacular name.

Nad Muang Nam Nao (หนาดม่วงน้ำหนาว).

Figures

Figure 5. Morphology of Vernonieae in Thailand 1. A Acilepis attenuata B Acilepis divergens C Acilepis namnaoensis D Acilepis ngaoensis E Acilepis peguensis F Acilepis principis G Acilepis saligna H Acilepis silhetensis I Acilepis squarrosa.