Camchaya gracilis
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Ordo: Asterales
Familia: Asteraceae
Genus: Camchaya
Name
Camchaya gracilis (Gagnep.) S. Bunwong & H. Rob., Proc. Biol. Soc. Washington 122(3): 361. 2009. – Wikispecies link – IPNI link – Pensoft Profile
- Iodocephalus gracilis Thorel ex Gagnep., Notul. Syst. (Paris) 4: 17. 1920.
Type
Laos, Bassac, Thorel 2396 (holotype: P!). Fig. 6A.
Description
Annual herbs, 50–100 cm tall. Stems erect, terete, inconspicuously ribbed; villose with uniseriate hairs, T-shaped hairs and glands. Leaves alternate, elliptic-oblong, 3–6 by 0.3–1 cm, margin serrate or entire, apex acute, base attenuate, subcoriaceous; upper surface scabrous lacking glands, lower surface scabrous with whip-shaped hairs and capitate glands, lateral veins 8–10-paired; petioles up to 3 mm long. Capitulescences terminal and axillary, corymbose. Capitula campanulate, 8–10 mm long, pedunculate. Receptacle flat, 2–3 mm in diam., glabrous. Involucres campanulate, in 4–5 series, 7–8 mm long, 6–7 mm in diam. Phyllaries imbricate, light green or purple, margin entire without spines, outer surface arachnoid, glandular; the outer ones ovate, apex acute to acuminate; the inner ones ovate-lanceolate, apex acute to acuminate. Florets 50–70; corollas funnelform, purple, puberulous, glands capitate; corolla tubes 3–5 mm long; corolla lobes 2–3 mm long. Anthers ca. 2 mm long, apical appendage acute, base rounded. Styles purple, 5–7 mm long, branches 1.5–2 mm long. Achenes obovate, ca. 2 mm long, puberulous with twin hairs and capitate glands, 4–5-ribbed, carpopodium absent. Pappus 1–2 mm long in 1 series, frequently deciduous or lacking.
Distribution
Thailand: Ubon Ratchathani. Laos.
Specimens examined
Thailand, Ubon Ratchathani, route number 2222, 15°18.59'N, 105°23.15'E, route number 2222, 28 Oct 2007, S. Bunwong 346 (KKU, US). Route number 2112 to Khong Chiam, 16 Sep 2004, R. Pooma, K. Phattanahirankanok & S. Sirimongkol 4737 (AAU).
Diagnostic characters
Camchaya gracilis is characterized by phyllaries without marginal spines, achenes with 4–5 ribs and leaves that are narrowly elliptic-oblong. This species is included in Camchaya as it shares 6-porate pollen found in no other genera.
Ecology
Dipterocarp forest, alt. 150 m; flowering October to December.
Vernacular name
Ao Ra Nid (อรนิช).
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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