Oncidium dichromaticum Rchb.f. 1855 SECTION Oblongata

Flower Differences

Plant differences

Pseudobulb temination differences Photo courtesy of Daniel Jimenez

Plant closeup Photo courtesy of Jay Pfahl

Part shade Hot Warm Spring

Common Name or Meaning The Two Colored Oncidium

Flower Size 1" [2.5 cm]

Found in the Guanacaste coast of Costa Rica and Panama at elevations of 20 to 1100 meters as a small sized, hot to warm growing epiphyte on large tree trunks among Oncidium ampliatum, distinguished out of flower by it's less rounded, flat, smooth pseudobulbs with deep purple brown spots and has a small interuption at the apex where it carries 3 apical, linear-lanceolate, acute, narrowing below into a conduplicate base leaf that blooms in the spring on a 16" + {40 cm+} long, paniculate, with short, slender, several flowered inflorescence carrying a few flowers on each branch

Often confused with Oncidium parviflorum but differs in always having a white callus, bifurcate lip, and an erect dorsal petal as well as 5 short -permanent- leaves, two bracteous pseudo-leaves at the bottom of the bulb and THREE very characteristic leaves on top, and this plant always shows a small interruption at the top of the bulb. See differences photo, flower and plant.

Synonyms Oncidium andreae Königer 1996; Oncidium cabagrae Schltr. 1911; Oncidium castaneum Rchb.f. ex Kraenzl. 1922; Oncidium rechingerianum Kraenzl. 1922

References W3 Tropicos, Kew Monocot list , IPNI ; Lankester's Epidendra Website CR ; *Bonplandia 3: 215. 1855; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O rechingerianum drawing ok; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 drawing ok; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium cabagrae; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium castaneum; Repert. Sp. Nov. Regni. Veg. Beih. 19: 258. Costa Rica Schlechter 1923 as O cabagre; Repert. Sp. Nov. Regni. Veg. Beih. 19: 261. Costa Rica Schlechter 1923 as O rechingerianum; The Orchids of Panama L.O. Williams & P Allen 1946 as O cabagre; Encyclopedia of Cultivated Orchids Hawkes 1965 as O cabagre; Icones Planetarum Tropicarum Plate 1466 Mora & Atwood 1992 as O cabagrae drawing soso; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 as O cabagre drawing soso; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1997; Orquideologia Vol. 23 No 2 2004; Orchid Species Culture: Oncidium, Bakers 2006; Oncidium Vol 2 Koniger 2005; Orquideas de la Serrania del Baudo Misas Urreta 2006 drawing/photo fide;

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