Camchaya thailandica Bunwong, Chantar. & S.C.Keeley, PhytoKeys 12: 53-57. 2012.
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publication ID |
https://dx.doi.org/10.3897/phytokeys.37.6499 |
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persistent identifier |
https://treatment.plazi.org/id/F9FD3F65-85F3-5282-9AA4-FD7E7F0817B2 |
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treatment provided by |
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scientific name |
Camchaya thailandica Bunwong, Chantar. & S.C.Keeley, PhytoKeys 12: 53-57. 2012. |
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Camchaya thailandica Bunwong, Chantar. & S.C.Keeley, PhytoKeys 12: 53-57. 2012.
Type.
Thailand. Prov. Udon Thani, rare on rocky area in Phu Phrabat historical park, S. Bunwong 328 (holotype KKU!, isotype US!). Figs 6H-I View Figure 6 .
Description.
Annual herbs, 50-100 cm tall. Stems erect, terete, inconspicuously ribbed; scabrous with uniseriate hairs, T-shaped hairs and glands. Leaves alternate, elliptic to oblong, 3-8 by 2-3 cm, margin serrate, apex acute, base attenuate, chartaceous; both surfaces puberulous with cylindrical hairs, T-shaped hairs and capitate glands; lateral veins 5-10-paired; petioles up to 2 cm long. Capitulescences terminal and axillary, corymbose. Capitula campanulate, 8-10 mm long, pedunculate. Receptacle convex, 2.5-3 mm in diam., glabrous. Involucres broadly campanulate, in 5-6 series, 7-8 mm long, 5-6 mm in diam. Phyllaries imbricate, light green with purple apex, margin pale without spine, outer surface arachnoid glandular; the outer and the middle ones ovate, apex acuminate; the inner ones lanceolate to oblong, apex acuminate. Florets 50-70; corollas funnelform, purple, puberulous, glands capitate; corolla tubes 6-7 mm long; corolla lobes 2.5-3 mm long. Anthers ca. 2 mm long, apical appendage acute, base rounded. Styles purple, 6-7 mm long, branches 2-2.5 mm long. Achenes obovate, ca. 1.5 mm long, glandular, 10-ribbed. Pappus in 1 series of bristles, 1-2 mm long, present in some florets, deciduous.
Distribution.
Thailand: Udon Thani. Endemic.
Specimens examined.
Thailand. Udon Thani, Ban Phue district, Phu Phrabat historical park, 17°43.84'N, 102°29.65'E, S. Bunwong 328 (KKU, US).
Diagnostic characters.
This species is similar to Vernonia gracilis in having ovate phyllaries which its without marginal spine but differs in 10-ribbed achenes and broadly ovate leaf shape.
Ecology.
Rocky areas in dipterocarp forest, alt. 300 m; flowering November to December.
Vernacular name.
Muk Udon (มุกอุดร).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.