Acilepis divergens
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Ordo: Asterales
Familia: Asteraceae
Genus: Acilepis
Name
Acilepis divergens (Edgew.) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 122(2): 140. 2009. – Wikispecies link – IPNI link – Pensoft Profile
- Conyza divergens Wall., Numer. List [Wallich] no. 3027A, comp. no. 137, nom. nud.
- Eupatorium divergens Roxb., Fl. Ind. 3: 414. 1832.
- Vernonia divergens (Roxb.) Edgew., J. Asiat. Soc. Bengal 2: 172. 1853.
Type
India; Wallich 3027A (holotype: K!). Fig. 5B.
Description
Robust herbs to subshrubs, 1–3 m tall. Stems erect, inconspicuously ribbed, pilose-villose or tomentose. Leaves 10–13 by 3–5 cm, ovate or elliptic, margin serrate, apex acute, base attenuate, subcoriaceous; both surfaces scabrous with whip-shaped hairs and capitate glands; lateral veins 6–10-paired; petioles up to 1 cm long. Capitulescences terminal and axillary, corymbose. Capitula narrowly campanulate, subsessile or shortly pedunculate, 9–10 mm long. Receptacle flat, ca. 1 mm in diam., glabrous. Involucres narrowly campanulate or slightly oblong-cylindrical, in 3–4 series, 4–5 mm long, 3–3.5 mm in diam., herbaceous. Phyllaries green or purple apically, margin piliferous, outer surface arachnoid, glandular; the outer and the middle ones ovate, acuminate or apiculate; the inner ones lanceolate to oblong, apex acuminate. Florets 6–10; corollas funnelform, purple, glandular; corolla tubes 4–5 mm long; corolla lobes 2–2.5 mm long. Anthers 2–2.5 mm long, apical appendage acute, base obtuse. Styles purple, 5–6 mm long, branches 1.5–2 mm long. Achenes obovate, ca. 2 mm long, 10-ribbed, glandular. Pappus bristles, the inner ones 4–5 mm long.
Distribution
Thailand: Chiang Mai, Phayao, Nan, Tak, Sukhothai, Loei, Kanchanaburi. China (Yunnan), India, Myanmar, Laos, Myanmar, Vietnam.
Specimens examined
Thailand. Chiang Mai, Doi Angkhang, 19°54.08'N, 99°2.34'E, 3 Jan 2008, S. Bunwong 377 (KKU, US); Chiang Mai, Doi Chiangdao, 29 Dec 1961, K. Bunchuai 102 (BKF, C, E, K, L, P); Doi Chiangdao, 6 Jan 1975, R. Geesink, P. Hiepko & C. Phengklai 8115 (BKF, C); Doi In Thanon, 12 Jan 1994, N. Fukuoka & H. Koyama T-62103 (BKF); Doi In Thanon, 9 Dec 1984, H. Koyama, S. Mitsuta & T. Yahara T-39916 (BKF); Doi In Thanon, 9 Dec 1984, H. Koyama, S. Mitsuta & T. Yahara T-48693 (BKF); Om Koi, 20 Jan 1964, B. Hansen, G. Siedenfaden & T. Smitinand 10796 (BKF, C, L); Doi Sutep, 24 Jan 1909, A.F.G. Kerr 524 (BM, K); Sa Moeng, 3 Feb 1913, A.F.G. Kerr 2918 (BM, K); Chom Thong, 9 Feb 1998, F. Konta, C. Phengklai & S. Khao-iam 4135 (BKF); Kanchanaburi, Don Ta Hom, 13 Apr 1965, Adisai 1046 (BK); Si Sa Wat, 16 Jan 1926, A.F.G. Kerr 10227 (BK, K, BM); Chiang Rai, 25 Dec 1993, Charal 431 (BKF); Tak, Doi Pae Poe, 15 Mar 1968, B. Hansen & T. Smitinand 12926 (BKF, C, E, K, L); Mae Sod, 26 Jan 1985, Y. Paisooksantivatana 1590-85 (BK).
Ecology
Mixed deciduous and cloud forests, alt. 300–1850 m; flowering October to April.
Diagnostic characters
Acilepis divergens is clearly distinguished by having a corymbose capitulescences with short peduncle and its capitula that are among the smallest in Acilepis spp.
Vernacular names
San Ngern (สารเงิน), Nat Foi (หนาดฝอย).
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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