Thrixspermum caudatum P.O'Byrne & Gokusing 2016 SECTION Thrixspermum

TYPE Drawing

Photo/TYPE Drawing by Peter O'Byrne

Common Name The Caudate Thrixspermum [refers to the long apex of the lip]

Flower Size 2.8 to 3.2" [7 to 8 cm]

Found in Sabah Borneo on lowland primary forests, hill forests and lower montane forests at elevations of 300 to 1400 meters as a small sized, hot to cool growing epiphyte with spreading stems enveloped by compressed, green, persistent, longer than the internodes sheaths and carrying spreading, strap shaped to oblong, tapering at both ends, green, leathery, obtuse, unequally bilobed leaves that blooms in the winter and spring on a descending, from the nodes near the base of the stem, 2.8 to 7.2" [7 to 18 cm] or more overall, peduncle 1.8 to 6" [4.5 to 15 cm] long, wiry, slightly compressed provided with a basal and 2 to 3 more below the rachis, green to maroon scales, rachis compressed, to [4.7 cm] long or more, fractiflex, maroon with green marks, successively single, several flowered inflorescence with well separated, compressed, falcate, acute, much shorter than the ovary floral bracts and carrying ephemeral, wide opening flowers.

Similar to T acuminatissimum but T caudatum differs in the swollen fleshy midlobe of the lip that is conspicuously glandular haired, and the disc having a pair of closely adpressed calli that do not exceed onto the midlobe.


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