Odontoglossum wallisii Linden & Rchb.f. 1870 SECTION Canaliculatum SERIES Cirrhosum Dalstrom 2020

Photo by Guido Deburghgraeve

Part shade Cool Cold Spring through Fall

Common Name Wallis' Odontoglossum [German Orchid Collector in South America 1800's]

Flower Size 1.8" [4.5 cm]

Found in Antioquia and Cundinamarca departments of Colombia and Merida state of Venezuela on the edges of cloud forests at elevations of 1800 to 2500 meters as a small to just medium sized, cool to cold growing epiphyte with narrowly ovoid, close set, longitudinally furrowed, laterally compressed pseudobulbs enveloped basally by 2 to 3 pairs of distichous, imbricating, leaf-bearing sheaths and carrying 2, narrowly linear, sharply acute, erect to arching, conduplicate below into the elongate, narrow, petiolate base leaves that blooms in the spring through fall on an axillary, slender, erect, to 18" [to 45 cm] long, 4 to 6 flowered, racemose inflorescence with the flowers loosely arranged towards the apex.

Synonyms Odontoglossum purum Rchb.f. 1872; Oncidium wallisii [Linden & Rchb.f] Chasre & Wms 2008

References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915; Atlas des Orchidees Cultivees Constantin 1920 drawing good; Encyclopedia of Cultivated Orchids Hawkes 1965; Flora de Venezuela Volumen XV Part 5 Foldats 1970; Orquideologia VOl 12 3/4 1977/8; Icones Planetarum Tropicarum plate 969 Dodson 1984 drawing fide; Native Colombian Orchids Vol 3 COS 1991 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Native Ecuadorian Orchids vol 3 Dodson 2002 photo fide; Orchid Species Culture, Oncidium Alliance Bakers 2006; Libro Rojo de Plantas De Colombia Vol 6 Primera Parte Saenz 2007; AOS Bulletin Vol 77 No 12 2008 as Oncidium wallisii; Orquideologia Vol 27 #1 2010 as Oerstedella wallisii photo fide; The Odontoglossum Story Dalstrom, Higgins & Deburghgraeve 2020 drawing/phto fide