Thrixspermum pachychilum P.O'Byrne & Gokusing 2016 SECTION Dendrocolla

TYPE Drawing

TYPE Drawing by Peter O'Byrne

Common Name The Thick Lipped Thrixspermum

Flower Size .68" [1.7 cm]

Found in Sabah Borneo in lowland forests climbing up mossy trunks of shrubs and trees at elevations around 1890 meters as a miniature sized, cool growing epiphyte with climbing stems enveloped by compressed, green, sulcate, persistent, longer than the internodes sheaths and carrying distichous, strap-shaped to elliptic, tapering at both ends, green constricted before the acute, briefly mucronate leaves that blooms in the fall on a suberect, arising from the lower and midstem nodes of the stem, peduncle .32 to .56" [.8 to 1.4 cm] long, provided with 2 tubular, basal bracts and sometimes another midway, expanding gradually before rachis, rachis swollen, to .6" [1.5 cm] or more, green, successively 1, several flowered inflorescence with quaquaversal, crowded, basally clasping rachis, triangular, free part recurved, thick and fleshy, subacute to obtuse apex shorter than the ovary floral bracts and carrying ephemeral, wide spreading flowers.

Similar to T patens but T pachychilum differs in the climbing habit, the recurved floral bracts that lack a subulate apex, oblong-elliptic lateral sepals witha broad base and a lip with a non-conical sac.


References W3 Tropicos, Kew Monocot list , IPNI ; *Malesian Orchid Journal Vol 18 2016 drawing/photo fide;