Abstract
Two new species, Cylindrolobus motuoensis and C. glabriflorus (Orchidaceae), from Southwestern China and north of Myanmar are described and illustrated with detailed photos. Cylindrolobus motuoensis is morphologically similar to C. gloensis and C. foetidus, but can be distinguished from them by having amplexicaul sterile bracts, dark red floral bracts, white flowers, falcate-lanceolate lateral sepals and central keel of lip running from base to the tip of mid-lobe. Cylindrolobus glabriflorus is similar to C. hegdei and C. tenuicaulis but differs from them by having longer and wider leaves, obovate bracts, and the reddish brown central papillate keel of lip.
Highlights
The genus Cylindrolobus Blume consists of 60‒70 species, distributed in the tropical region from East Himalaya, China, Southeast Asia to New Guinea (Chen et al 2009, Ormerod 2014, Ng et al 2018)
Cylindrolobus motuoensis is similar to C. gloensis (Ormerod & Agrawala) Schuit., Y.P
The new species is named after Motuo, Xizang Autonomous Region of China, where it was discovered in a subtropical evergreen broad-leaved forest
Summary
The genus Cylindrolobus Blume consists of 60‒70 species, distributed in the tropical region from East Himalaya, China, Southeast Asia to New Guinea (Chen et al 2009, Ormerod 2014, Ng et al 2018). Cylindrolobus was originally proposed as a section of Eria Lindl., Pridgeon et al (2005) suggested that Cylindrolobus should be subsumed into Callostylis Blume. Recent molecular and morphological studies suggest that Cylindrolobus is a distinct genus, characterized by a multi-noded stem with leaves at apex, short inflorescences with one to several flowers and conspicuous and colorful bracts (Chen et al 2009, Ng et al 2018).
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