Okia birmanica
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Ordo: Asterales
Familia: Asteraceae
Genus: Okia
Name
Okia birmanica (Kuntze) H.Rob. & Skvarla, Proc. Biol. Soc. Washington 123(1): 91. 2010. – Wikispecies link – IPNI link – Pensoft Profile
- Vernonia birmanica (Kuntze) Merr., Brittonia 2: 200. 1936.
- Cacalia birmanica Kuntze, Rev. Gen. P1.: 323. 1891.
Type
Myanmar, Moulmein, O. Kuntze 6271 (holotype: K!). Fig. 10A.
Description
Annual herbs, 1–2 m tall. Stems erect, inconspicuously ribbed, puberulous. Leaves cauline, 5–20 by 1–5 cm, lanceolate, margin serrate, apex acuminate, base attenuate, chartaceous; upper surface scabrous, lower surface puberulous, lateral veins 8–12-paired; petioles up to 2 cm long. Capitulescences terminal, loosely paniculate. Capitula campanulate, 10–12 mm long, pedunculate. Receptacle convex, glabrous. Involucres subglobular, in 4–5 series, ca. 7 mm long. Phyllaries imbricate, green with purple apex, outer surface arachnoid; the outer and the middle ones ovate or elliptic, apex obtuse; the inner ones broadly oblong, apex obtuse. Florets ca. 55; corollas funnelform, white or purple, puberulous without glands. Achenes subterete, ca. 4 mm long, 10-ribbed, aculeate between ribs. Pappus in 2 series of bristles, the inner ones ca. 7 mm long, persistent.
Distribution
Thailand: Lampang, Kanchanaburi. Myanmar.
Specimens examined
Thailand, Kanchanaburi, Sai Yok national park, 14°22.29'N, 98°51.07'E, 4 Dec 1961, K. Larsen 8492 (K); Lampang, Jae Son national park, 4 Nov 1996, J.F. Maxwell 96-1490 (BKF).
Diagnostic characters
Okia birmanica is distinguished by its long and slender pedicel in a loose panicle, phyllaries mostly obtuse with thickened tips, and cup-shaped involucre.
Ecology
Under dense canopy on the top of limestone mountain, alt. 650–1000 m; flowering September to December.
Vernacular name
Tum Doi (ตุ้มดอย).
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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