Cleisostoma aristatum P.O'Byrne 2015 SECTION Cleisostoma

TYPE Drawing TYPE Photos/TYPE Drawing by Peter O'Byrne


Common Name The Awned Cleisostoma [refers to the bristle-like labellum side lobes]

Flower Size .24 to .34" [6 to 8.5 mm]

Found in Sabah Borneo at elevations around 1240 meters as a large to giant sized, cool growing epiphyte with an erect, unbranched, leafy in the upper half, enveloped by sheaths stem carrying horizontally spreading, ligulate, externally keeled, green, tapering towards an unequal bilobed apex, lobules acute, leathery, leathery, green sheaths basally clasping leaves that blooms in the early winter on lateral, from an internode on the upper stem, horizontal, 4 to 4.8" [10 to 12 cm] long, peduncle .28 to .72" [.7 to 1.8 cm] long, paniculate, 3 to 4 evenly spaced branches, each branch 1.12 to 1.52" [2.8 to 3.8 cm] long, each with a basal bract, slightly 4 angled, green, crowded, 12 to 20 flowers per branch, simultaneously 50 to 65 flowered inflorescence with triangular, acute, persistent shorter than the ovary floral bracts and carrying outward facing, odorless flowers.


References W3 Tropicos, Kew Monocot list , IPNI ; *Malesian Orchid Journal Vol 15 P.O'Byrne 2015 photo/drawing fide;