Oncidium oliganthum [Rchb.f]L.O.Williams 1947 SECTION Stellata Photo by ©Tony Watkinson

Common Name The Sparse-Blooming Oncidium

Flower Size 1 1/2" [4 cm]

This rare, cloud forest, small to medium sized, cool to cold growing, epiphytic species is found in Mexico, Guatemala, El Salvador, and Nicaragua at elevations of 1600 to 2200 meters with ovoid, compressed, sulcate with time pseudobulbs subtended by several dry, thin sheaths, a few that are leaf-bearing with 2 to 3 apical, linear-elliptic to linear oblanceolate, subcoriaceous, obtuse leaves that blooms in the summer and fall on a basal, 6 to 16" [15 to 40 cm] long, racemose or a single, 2 flowered branch, erect-arcuate, few to several flowered inflorescence arising on a mature pseudobulb with triangular, obtuse, papery, tubular bracts carrying up to 7 weakly fragrant, waxy, successively opening flowers.

Synonyms *Odontoglossum oligantum Rchb.f 1856; Odontoglossum purpusii Schlechter 1925; Oncidium guatemalense Schlechter 1912;

References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1856 as Odontoglossum oliganthum; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium guatemalense drawing ok; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing fide; Icones Planetarum Tropicarum plate 1058 Dodson 1984 drawing fide; Icones Orchidacearum I Plate 76 Hagsater & Salazar 1990; AOS Bulletin Vol 61 No 5/458 1992 photo drawing ok; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Australian Orchid Review Vol 66 No 2 2001 photo; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Oncidium Vol 1 Koniger 2004; Orchid Species Culture: Oncidium, Bakers 2006; Guia de Orquideas de Chiapas Carlos Rommel Beutelspacher Baigts 2013 photo fide; Algunas Orquideas de Mexico Tomo 1 Suarez 2013 photo fide

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