Cyrtochilum nigratum (Lindl. & Paxton) Kraenzl. 1922

SECTION Cimicifera Lindley

Photo courtesy of Botanická zahrada a arboretum Mendelova zemedelská a lesnická univerzita v Brne, Brno, Czech


Common Name The Blackish Cyrtochilum [refers to the dark purple spots on the sepal and petals]

Flower Size 1" [2.5 cm]

Found in Colombia and Venezuela, Guyana and south to Brazil in cloud forests or shrublands at elevations of 1500 to 2200 meters as a medium sized, cool to cold growing occasional terrestrial in thin soils in scrub, lithophyte on top of mesas and epiphyte low on trees in dwarf forests with pear-shaped, pale brown to yellow green, strongly laterally compressed, ancipitous, longitudinally grooved pseudobulbs partially enveloped basally by several pairs of imbricating, distichous, leaf-bearing sheaths and carrying 2 to 3, narrowly elliptic, stiff, acute, mostly keeled dorsally, shortly conduplicate below into the base leaves and blooms in the spring, summer and fall on an erect, then pendant, to more than 79" [200 cm] long, lightly or strongly paniculate, each to 24" [60 cm] long branch carrying 5 to 15 flowers, many flowered inflorescence that arises on a newly matured pseudobulb and carries slightly fragrant, showy flowers.

Synonyms Oncidium nigratum Lindl. & Paxton 1850; Oncidium uaipanense Schnee 1952

References W3 Tropicos, Kew Monocot list , IPNI ; *Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 drawing hmm; AOS Bulletin Vol 33 #8 1964 as Oncidium nigratum; Venezuelan Orchids Vol 3 Dunsterville & Garay 1965 as Oncidium nigratum drawing fide; AOS Bulletin Vol 36 #9 1967 as Oncidium nigratum; Flora de Venezuela Volumen XV Part 5 Foldats 1970 as Oncidium nigratum drawing fide; Orchids of Venezuela, An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 as Oncidium nigratum drawing fide; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 as Oncidium nigratum drawing fide; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 as Oncidium nigratum drawing ok; Orquideologia Vol 23 #2 2004 as Oncidium nigratum; Oncidium Vol 2 Koniger 2005 as Oncidium nigratum drawing/photo fide; Orquideologia Vol. 23 No 2 2004; Orchid Species Culture: Oncidium/Odontoglossum alliance Bakers 2006; Orquideas de Roirama Luz & Franco 2012 photo fide;