Peristylus tenuicallus Ormerod Drawing by Leonid Averyanov and the The Orchids of Vietnam Illustrated survey Part 3 Subfamily Epidendroideae primitive_tribes -Neottieae VanilleaeGastrodieaeNervilieae Websitre

Common Name The Thin Callous Inflorescence [refers to the callus on the center of the lip]

Flower Size .08" [2 mm]

Found in northern Vietnam in montane broadleaved forest on granite at elevations around 1500 meters as a miniature sized, cool growing terrestrial with narrowly obovoid, pubescent tubers giving rise to an erect, terete, glabrous stem carrying 3 apical, ovate to narrowly ovate, acute leaves that blooms in the summer on an erect, glabrous, slender, erect, to 2.4" [6 cm] long, peduncle ebractate, 1.8" [2.7 cm] long, rachis 1.28" [3.2 cm] long, laxly 7 flowered inflorescence with narrowly ovate to triangular cuneate, shorter to almost as long as the ovary floral bracts and carrying resupinate flowers.

"The erect cylindrical callus arising at the center of the lip represent unique features unknown in any other species of the genus. Generic placement of this unusual plant needs further studies of newly collected fresh material." Turczaninowia 2011, 14(2) : 15100 Averyanov/Ormerod 2011 drawing fide


References W3 Tropicos, Kew Monocot list , IPNI ; *Turczaninowia 2011, 14(2) : 15100 Ormerod/Averyanov 2011 drawing fide