Sunday, July 15, 2018

[Botany • 2018] Odontochilus putaoensis (Orchidaceae) • A New Species from Myanmar

Odontochilus putaoensis X.H. Jin, L.A. Ye & A.T. Mu

in Ye, Mu & Jin, 2018.  


Abstract
Odontochilus putaoensis, a new species of Orchidaceae, is described and illustrated from Putao Township, Kachin State, Myanmar. Odontochilus putaoensis is close to O. duplex, but can be easily distinguished from the latter by having a light yellow lip, a bisaccate hypochile with a small, erect, blade-like and emarginate callus within each sac, a mesochile with a pair of dentate-pectinate flanges and a bilobed epichile with a pair of widely diverging lobes that are erect and concave. An identification key to the Southeast Asian species of Odontochilus and colour photographs of O. putaoensis are provided. A preliminary conservation assessment according to the IUCN Red List Categories and Criteria is given for the new species.

Keywords: Cranichideae, Kachin State, key, new species, southeast Asia, terrestrial orchid

Figure 1. Odontochilus putaoensis X.H.Jin, L.A.Ye & A.T.Mu.
 A Habit of Odontochilus putaoensis B Front view of flower, showing lip epichile with a pair of erect and concave lobes C Hypochile of Odontochilus putaoensis, indicating small, erect, blade-like, emarginate callus within each sac D Dissected flower, showing pedicel and ovary, column, sepals, petals, lip and a pair of clavate pollinia E Dorsal view of flower, showing dorsal sepal forming a hood with petals. Photographed by X.H. Jin.

Odontochilus putaoensis X.H. Jin, L.A. Ye & A.T. Mu, sp. nov.

Diagnosis: Odontochilus putaoensis is similar to O. duplex, but can be easily distinguished from the latter by having a light yellow lip composed of a bisaccate hypochile with a small, erect, blade-like and emarginate callus within each sac, a mesochile with a pair of dentate-pectinate flanges and bilobed epichile with a pair of widely diverging lobes that are erect and concave.

Type: MYANMAR. Kachin State: Putao Township, Hponkanrazi Wildlife Sanctuary, subtropical, evergreen, broad-leaved, montane forest, 2000 m a.s.l., 20 October 2014, Xiaohua Jin et al, PT-ET 959 (Holotype, PE!).

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Etymology: The new species is named after Putao, the northernmost town of Myanmar, near which it was discovered in a vast area of undisturbed mountain forest.

Distribution and habitat: Odontochilus putaoensis grows in shaded and damp humus in humid, broad-leaved, evergreen forest, at an elevation of about 1500-2000 m. At present, O. putaoensis is only known from the type locality.




Ye Lwin Aung, Aye Thin Mu and Xiaohua Jin. 2018. Odontochilus putaoensis (Cranichideae, Orchidaceae), A New Species from Myanmar. PhytoKeys. 103: 19-26.   DOI: 10.3897/phytokeys.103.25913

  

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