Gymnanthemum extensum
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Ordo: Asterales
Familia: Asteraceae
Genus: Gymnanthemum
Name
Gymnanthemum extensum (DC.) Steetz, Naturw. Reise Mossambique [Peters] 6(Bot., 2): 337. 1864. – Wikispecies link – ZooBank link – Pensoft Profile
- Vernonia extensa DC., Prodr. 5: 33. 1836.
- Conyza extensa Wall., Numer. List [Wallich] no. 3061, comp. no. 126, nom. nud.
- Gymnanthemum extensum Type. Nepal; Wallich 3061 (holotype: G!).
- Vernonia cylindriceps C.B. Clarke, J. Linn. Soc. Bot. 25: 35. 1890.
- Gymnanthemum cylindriceps (C.B.Clarke) H.Rob., Proc. Biol. Soc. Washington 112(1): 241. 1999.
- Gymnanthemum extensum Type: India, Hartook Mekong, C.B. Clarke 42109 (holotype: K!).
Description
Shrubs or subshrubs 2–6 m tall. Stems caulescent, young branches inconspicuously ribbed, white puberulous. Leaves 7–13 by 2–4 cm, oblanceolate, margin serrate, apex acute, base attenuate, chartaceous; upper surface puberulous, without glands; lower surface puberulous with whip-shaped hairs, cylindrical hairs and capitate glands; lateral veins 7–12-paired; petioles up to 1 cm long. Capitulescences terminal, corymbose. Capitula narrowly campanulate, 14–16 mm long, pedunculate. Receptacle convex, 1–1.5 mm in diam., hairy. Involucres slightly oblong-cylindrical, in 5–6 series, 8–10 mm long, 3–4 mm in diam. Phyllaries imbricate, green, margin piliferous, outer surface arachnoid without glands; the outer and the middle ones, ovate, apex obtuse; the inner ones lanceolate or ovate-lanceolate, apex obtuse or rounded. Florets 5–10; corollas funnelform, purple or white, glandular, corolla tubes 6–7 mm long; corolla lobes 4–4.5 mm long. Anthers 4–4.5 mm long, apical appendage acute, base obtuse. Styles purple, 9–10 mm long, branches 2, 4–5 mm long. Achenes turbinate, 3–3.5 mm long, 10-ribbed, covered with dense hairs and capitate glands. Pappus in 2 series of bristles, the inner ones 8.5–9 mm long, persistent.
Distribution
Thailand: Chiang Mai, Chiang Rai. China (Yunnan), India, Nepal, Myanmar.
Specimens examined
Thailand, Chiang Mai, Doi Chiangdao wildlife sanctuary, 19°24.11'N, 98°55.10'E, 20 Dec 2002, S. Bunwong 76 (KKU); Chiang Mai, Doi Ang Khang, 3 Jan 2008, 19°54.1'N, 99°2.4'E, 3 Jan 2008, S. Bunwong 378 (KKU, US); Fang, 11 Feb 1983, H. Koyama, H. Terao & Th. Wongprasert T-33345 (BKF); Fang, 12 Feb 1983, H. Koyama, H. Terao & Th. Wongprasert T-33458 (BKF); Mae Tang, Doi Chang, 12 Feb 1900, R. Pooma 382 (BKF); Doi Chang, 18 Jan 1983, H. Koyama, T. Yahara & W. Nanakorn T-32726 (BKF, L); Doi Chang, 23 Oct 1979, T. Shimizu, H. Toyokuni, H. Koyama, T. Yahama & T. Santisuk 20608 (BKF); Doi Anga Ga, Inthanon, 7 Feb 1931, H.B.G. Garrett 629 (BKF, BM, K, P); Doi Inthanon, 22 Mar 1967, T. Smitinand et al. 10280 (BK, BKF, K, L, P); Inthanon, 20 May 1970, Worawoot 95 (BKF); Doi Chiangdao, 7 Feb 1983, H. Koyama, H. Terao & Th. Wongprasert T-33185 (BKF); Chiang Rai, Doi Thung, Mae Sai, 14 Feb 1983, H. Koyama, H. Terao & Th. Wongprasert T-33515 (BKF).
Diagnostic characters
This species is characterized by discinctly sweet smell, the habit of shrubs or subshrubs, and obtuse phyllaries.
Ecology
Evergreen or pine-oak forest, alt. 1000–2000 m; flowering December to April.
Vernacular name
Pim Pai Lin (พิมพ์ไพลิน).
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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