Thrixspermum triangulare Ames & C.Schweinf. 1920 SECTION Thrixspermum Photo by © Gary Meyer and The Swiss Orchid Foundation at the Jany Renz Herbarium Website

Plant and Flowers Photo courtesy of André Schuiteman, Dr. E.F. de Vogel and Jaap Vermeulen and Their Netherlands National Herbarium Website

Part Shade CoolColdWinterSpringSummerFall

Common Name or Meaning The Triangular Thrixspermum [refers to the triangular callus on the lip]

Flower Size 1.2" [3 cm]

Found only in north Borneo in lower and upper montane forests on tree roots, branches and rocks at elevations of 1200 to 3400 meters as a small sized, cool to cold growing epiphyte or lithophyte with an unbranched stem enveloped completely by leaf-bearing sheaths and carrying several distichous, spreading, linear-lanceolate, linear or ligulate, coriaceous, rigid, fleshy, mid-nerve sharply carinate beneath, unequally obliquely or equally obtusely bilobed apically, narrowing below slightly into the conduplicate base leaves attenuate to the striate-nervose sheaths that blooms at any time of the year on an axillary, spreading to ascending, 9" [22.5 cm] long, laterally flattened, fractiflex, erect then arcuate, slightly fleshy inflorescence with ovate, obtuse, clasping bracts and distichous, equitant, ovate-triangular, subacute to obtuse, strongly complanate, broadly keeled dorsally, clasping, cymbiform floral bracts that carries the single successively opening, several to many flowers.

Synonyms

References W3 Tropicos, Kew Monocot list , IPNI ; The Plants of Mount Kinabalu Vol 2 Orchids Beaman, Wood, Beaman & Beaman 1993 photo fide; The Orchids of Borneo Vol 1 Chan Lamb Shim & Wood 1994; A Checklist of the Orchids of Borneo Wood & Cribb 1994; Orchids of Borneo Wood Vol 4 2003 drawing/photo fide; Malesian Orchid Journal Vol 5 2010; The Orchids of Mount Kinabalu Vol 1 Wood, Beaman, Lamb, Chu Lun and Beaman 2011 drawing/photo fide; The Orchids of Mount Kinabalu Vol 2 Wood, Beaman, Lamb, Chu Lun and Beaman 2011

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