Acilepis ngaoensis
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Ordo: Asterales
Familia: Asteraceae
Genus: Acilepis
Name
Acilepis ngaoensis (H.Koyama) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 141. 2009. – Wikispecies link – IPNI link – Pensoft Profile
- Vernonia ngaoensis H.Koyama, Bull. Natl. Sci. Mus. Tokyo, Ser. B 30(1): 25. 2004.
Type
Thailand, Ranong, Muang District, Ngao waterfall, T. Shimitzu, H. Toyokuni, H. Koyama, T. Yahara & C. Niyomdham T-26543 (holotype: KYO!). Fig. 5D.
Description
Perennial herbs, 60–120 cm tall. Stems erect, conspicuously ribbed, puberulous. Leaves 10–20 by 2–5 cm, elliptic or oblanceolate, margin serrate, apex acuminate to acuminate, base cuneate, subcoriaceous; both surfaces scabrous with whip-shaped hairs and capitate glands; lateral veins 9–11-paired; petioles up to 10 mm long. Capitulescences terminal or axillary, solitary or loosely paniculate. Capitula campanulate, 10–20 mm long, pedunculate. Receptacle flat, hairy. Involucres campanulate, in 6–7 series, 10–15 mm long, herbaceous. Phyllaries light green or purple apically, margin piliferous, outer surface arachnoid, glands capitate; the outer and the middle ones ovate or lanceolate, apex spinose; the inner ones lanceolate or oblong, apex apiculate. Florets ca. 80; 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, 3–4 mm long, 10-ribbed, pubescent with twin hairs and glands. Pappus bristles, the inner ones 8–9 mm long.
Distribution
Thailand: Ranong. Endemic.
Specimens examined
Thailand. Ranong, Muang District, Ngao waterfall, 9°51.38'N, 98°37.68'E, 25 Jan 2008, S. Bunwong 386 (KKU, US); Ngao waterfall, 10 Dec 1974, S. Indrapong 84 (BKF); Ngao waterfall, 10 Dec 1974, S. Indrapong 843 (K, L); Ngao waterfall, 28 Jan 1968, J.F. Maxwell 87-88 (AAU, BKF, CMU, L, P, PSU); Ngao waterfall, 22 Nov 1993, T. Santisuk 650 (BKF); Ngao waterfall, 8 Dec 1979, T. Shimitzu, H.Toyokuni, H. Koyama, T. Yahara & C. Niyomdham T-26543 (KYO).
Ecology
Rocky dry dipterocarp, alt. 100 m; flowering December to January.
Diagnostic characters
Acilepis ngaoensis is recognized by having large capitula with long peduncles, phyllaries not reflexed, and capitulescences solitary or loosely paniculate. Its specific epithet is derived from Ngao waterfall national park in Ranong province.
Vernacular name
Nad Muang Ngao (หนาดม่วงหงาว).
Taxon Treatment
- Bunwong, S; Chantaranothai, P; Keeley, S; 2014: Revisions and key to the Vernonieae (Compositae) of Thailand PhytoKeys, 37: 25-101. doi
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