Thursday, December 27, 2012

[Botany • 2012] Camchaya thailandica • A new species of Camchaya (Asteraceae, Vernonieae) from northeastern Thailand

Camchaya thailandica Bunwong, Chantar. & S.C.Keeley

Camchaya thailandica Bunwong, Chantar. & S.C.Keeley, sp. nov. from Phu Phrabat Historical Park, Udon Thani, Thailand is described as a new species. Plant of this new species are similar to Camchaya gracilis (Gagnep.) Bunwong & H.Rob. but differ in having ovate phyllaries without margin spines, 10-ribbed achenes, and broadly ovate leaves. This species is a rare endemic known only from the type collection and probably confined to open areas of sandstone hills in Udon Thani province. 

Keywords: Asteraceae, Compositae, Vernonieae, Camchaya, Thailand, new species

Figure 1. Capitulescences, A–B terminal C axillary. Note that phyllaries are in 5–6 series and without margin spines.

Distribution. Endemic to Thailand. Only found in Phu Phrabat Historical Park, Udon Thani province. 
Ecology. Rocky areas of sandstone hills, scattering in dipterocarp forest, flowering from November and December.

Sukhonthip Bunwong, Pranom Chantaranothai, Stirling Keeley. 2012. A new species of Camchaya (Asteraceae, Vernonieae) from Thailand. PhytoKeys. 12: 53–57, doi: 10.3897/phytokeys.12.3221