เปราะต้น (ดอกเหลือง) 3 ชนิดใหม่
• เปราะต้นภูวัว Caulokaempferia phuwoaensis
• เปราะหินภูลังกา Caulokaempferia phulangkaensis
• เปราะหินภูทอก Caulokaempferia phutokensis
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Three New Species of the Yellow-flowered Caulokaempferia (Zingiberaceae) from Northeastern Thailand
Chayan Picheansoonthon and Supachai Koonterm
Abstract
Three new species of the genus Caulokaempferia (Zingiberaceae) from northeastern Thailand, C. phuwoaensis Picheans. & Koonterm, C. phulangkaensis Picheans., and C. phutokensis Picheans. are described and illustrated. Relationship with other closely related taxa is also discussed.
Three new species of the genus Caulokaempferia (Zingiberaceae) from northeastern Thailand, C. phuwoaensis Picheans. & Koonterm, C. phulangkaensis Picheans., and C. phutokensis Picheans. are described and illustrated. Relationship with other closely related taxa is also discussed.
Keywords: Zingiberaceae, new Caulokaempferia, Northeastern Thailand.
• ว่านเปราะต้น เปราะต้นภูวัว
Caulokaempferia phuwoaensis Picheans. & Koonterm
Distribution: This new species can be found at Tham Noi (ถ้ำน้อย) and Jet Si Waterfall (น้ำตกเจ็ดสี) in Phu Woa Wildlife Sanctuary, Amphoe Bung Khla,Changwat Nong Khai in Northeastern Thailand.
Ecology: This new species grows on moist sandstone rocks near the waterfall under the shade of mixed deciduous forests, at the altitude of 203-325 m. It is one of the dominant species of the special type of seasonal wetland vegetation called “blanket marsh vegetation” only appearing in the rainy season.
Vernacular names: Wan Proa Ton (ว่านเปราะต้น), Proa Ton Phu Woa (เปราะต้นภูวัว)
Use: Medicinal.
Note: This new species is similar to C. jirawongsei Picheans. & Mokkamul, but can be easily distinguished by its shorter ligules (2-5 mm), fewer lanceolate-ovate to ovate leaves (3-5), broadly ovate bract(s), and 6-7(-10)-flowered lowest bract. Also, this new taxon is terrestrial and smaller in habit. Leaves of C. phuwoaensis Picheans. & Koonterm are thicker in texture, and generally arranged on the upper half of apseudostem.
• ว่านเปราะหิน เปราะหินภูลังกา เปราะต้นภูลังกา
Caulokaempferia phulangkaensis Picheans.
Distribution: This new species can be found in TadKham Waterfall (น้ำตกตาดขาม), Phu Langka National Park, Amphoe Ban Phaeng, Changwat Nakhon Panomin Northeastern Thailand.
Ecology: Moist red sandstone rocks along the waterfall, under the shade of mixed deciduous forests at the altitude of 176-195 m.
Vernacular names: Wan Proa Hin (ว่านเปราะหิน), Proa Hin Phu Langka (เปราะหินภูลังกา), Proa Ton PhuLangka (เปราะต้นภูลังกา)
Use: Medicinal.
Note: This new species is similar to C. jirawongsei Picheans. & Mokkamul, but can be easily distinguishedby its shorter ligules (2-5 mm), more leaves (7-10), andfewer bracts (1-2, rarely 3). It can be differentiated from C. phuwoaensis Picheans. & Koonterm by itsepilithic habit, more lanceolate leaves arranged along apseudostem, and fewer elliptic-ovate bracts. The labellum of this new species is unique, comparing with other taxa mentioned in this paper, in the long ligulate median lobe with apex divided halfway down and apex of each lobe acute.
• ว่านเปราะหิน เปราะหินภูทอก
Caulokaempferia phutokensis Picheans.
Distribution: This new species can be found in PhuTok Noi (ภูทอกน้อย), Amphoe Si Wilai, Changwat Nong Khai in Northeastern Thailand.
Ecology: Moist red sandstone rocks under theshade of mixed deciduous forests, at the altitude of 270-350 m.
Vernacular names: Wan Proa Hin (ว่านเปราะหิน), Proa Hin Phu Tok (เปราะหินภูทอก)
Use: Medicinal
Note: This new species is morphologically similar to C. jirawongsei Picheans. & Mokkamul, but can be easily distinguished by its large ovate leaves and a characteristic bract arrangement. In flowering stage, the bracts of this new taxon wraped tightly around an inflorescence axis, until later fruiting stage. Also, the“flowers” of this new species is very delicate, and will be shrunk within 2-3 hours after bloom.
[Botany • 2008] เปราะต้น (ดอกเหลือง) 3 ชนิดใหม่ | Three new species of the genus Caulokaempferia(Zingiberaceae) from NE Thailand
Taiwania, 53(3): 248-257, 2008
