Cyanthillium montanum
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Ordo: Asterales
Familia: Asteraceae
Genus: Cyanthillium
Name
Cyanthillium montanum (C.B.Clarke) Bunwong, Chantar. & S.C.Keeley comb. & stat. nov. – Wikispecies link – IPNI link – Pensoft Profile
- Vernonia cinerea b. montana C.B.Clarke, Comp. Ind.: 21. 1876.
- Vernonia cinerea var. montana (C.B.Clarke) Kosterm., Blumea 1: 416. 1935.
Type
India, Assam, Khasi hill (not seen). Fig. 7B.
Description
Annual herbs, 1–2 m tall. Stems erect, conspicuously ribbed, pilose-villose. Leaves 7–8 by 2–4 cm, ovate or ovate-lanceolate, margin serrate or dentate, apex acute, base attenuate, chartaceous; upper surface puberulous glandular; lower surface villose with whip-shaped hairs, T-shaped hairs and capitate glands; lateral veins 5–7-paired; petioles up to 2 cm long. Capitulescences terminal or axillary, paniculate. Capitula narrowly campanulate, 5–7 mm long, pedunculate. Receptacle flat, 2–2.5 mm in diam., glabrous. Involucres narrowly campanulate, in 3–4 series, 5–6 mm long, 3–4 mm in diam. Phyllaries imbricate, purplish, margin piliferous, outer surface hirsute without glands; the outer and the middle ones lanceolate, acuminate; the inner ones lanceolate to oblong, apex acuminate. Florets 20–30; corollas funnelform, purple, corolla tubes 4–5 mm long; corolla lobes ca. 2 mm long. Anthers 0.5–2 mm long, apical appendage acute, base obtuse. Styles purple, 5–6 mm long, branches 1–2 mm long. Achenes clavate, 1.5–2 mm long, 5–8-ribbed, densely pubescent with twin hairs and capitate glands. Pappus in 2 series of bristles, the inner ones 5–6 mm long.
Distribution
Thailand: Chiang Mai, Nan, Loei, Khon Kaen, Nakhon Ratchasima, Ubon Ratchathani. Laos, Myanmar, Vietnam, Indonesia (Sumatra).
Specimens examined
Thailand, Loei, Phu Ruea national park, 17°28.29'N, 101°21.10'E, S. Bunwong 16, (KKU), S. Bunwong 62 (KKU); Chiang Mai, Mae Rim district, Pong Yang or rock town, 18°56.15'N, 98°49.36'E, 10 Dec 2007, S. Bunwong 371 (KKU, US); Doi Sutep, 22 Feb 1988, J.F. Maxwell 88-213 (CMU); Doi Sutep, 1 Aug 1958, Th. Sørensen, K. Larsen& B. Hansen 6588 (BKF, C); Doi Inthanon,8 Jan 1983, H. Koyama, H. Terao & Th. Wongprasert T-32130 (BKF); Chiangdao, 9 Feb 1983, H. Koyama, H. Terao & Th. Wongprasert T-33279 (BKF); Chiangdao, 3 Jan 1990, J.F. Maxwell 90-10 (CMU, E, L); Doi Maeya, 19 Jan 1983, H. Koyama, H. Terao & Th. Wongprasert T-32800 (BKF); Hod, 11 Jan 1983, H. Koyama, H. Terao& Th. Wongprasert T-32307 (BKF); Doi Anga, 16 Jan 1935, H.B.G. Garrett 922 (AAU, BKF E, L, P); Mae Thang, Doi Chang, 24 Oct 1979, T. Shimizu, H. Toyokuni, H. Koyama, T. Yahama & T. Santisuk T-20676 (BKF); Loei, Phu Kra Dung national park, 1 Sep 1988, H. Takahashi & M.N. Tamura T- 63331 (BKF); Phu Rue national park, 23 Dec 1982, H. Koyama, H. Terao & Th. Wongprasert T-31565 (BKF); Kanchanaburi, Bo Ploi, 8 Nov 1979, T. Shimizu, H. Toyokuni, H. Koyama, T. Yahama & C. Niyomdham T-22031 (BKF).
Diagnostic characters
Cyanthillium montanum is separated from Cyanthillium cinereum by having villose to tomentose hairs on stems, branches, lower leaf surfaces and involucres, rather than appressed sericeous hairs. This species restricted to pine oak forest on the mountains.
Ecology
Hill evergreen or pine-oak forest, alt. 500–1000 m; flowering October to March.
Vernacular name
Pliw Doi (ปลิวดอย).
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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