Thursday, December 19, 2013

[Botany • 2013] Kohautia Cham. & Schltdl. (Rubiaceae) – A New Genus record for the Flora of Thailand: K. gracilis (Wall.) DC. discovered in Kanchanaburi


Figure 1. Kohautia gracilis (Wall.) DC.:
A. habit; B. young plant showing seemingly whorled leaf arrangement; C. schematic inflorescence structure (from Mantell 1985: Fig. 16); D. portion of inflorescence; E. detail of flowers.
All photographs by R. Pooma.

ABSTRACT
 The genus Kohautia (Rubiaceae) is newly recorded for the Flora of Thailand; the species Kohautia gracilis, previously only known from Pakistan, Nepal, India, Sri Lanka and Myanmar, has recently been discovered in Kanchanaburi. Notes on the delimitation of the genus and on the main distinctive character for the taxa of the OldenlandiaHedyotis complex and allies (= Hedyotideae in the old sense; now included in an expanded tribe Spermacoceae) are included.

KEY WORDS: Rubiaceae, KohautiaKohautia gracilis, Flora of Thailand, new genus record.


Distribution.— Pakistan, Nepal (type!), India, Sri Lanka, Myanmar, SOUTH-WESTERN Thailand.
Ecology.— Low limestone hills (Thailand). Elsewhere: in open grassland, on open dry rocky slopes, on fringes of coniferous forest; also in seasonally moist areas near streams, growing in sandy and clayey soils; mostly in fi re-prone habitats. Altitude: 180 m (Thailand). Elsewhere (65–)250–2000 m. Flowers: December (Thailand). Elsewhere November, January–July

Puff, C. 2013. Kohautia Cham. & Schltdl. (Rubiaceae) – A New Genus record for the Flora of Thailand: K. gracilis (Wall.) DC. discovered in Kanchanaburi. THAI FOR. BULL. (BOT.). 41: : 56–60. 

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