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2 plants cultivated by members of ORCHIDS.ORG.
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There are currently no photos of plants of Oncidium maderoi for sale by members of ORCHIDS.ORG. Below are other recent plants for sale:

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Orchid Species: Oncidium maderoi

Kew currently accepted name is Oncidium ornithorhynchum

Oncidium maderoi is an orchid species identified by Schltr. in 1920. Culture information and photos for this orchid are commonly detailed under the currently accepted name of Oncidium ornithorhynchum.
Genus
Oncidium (Onc.)
Grex
maderoi
Parents
Species
Author
Schltr.
Year
1920
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ORIGIN: A small sized, cold growing epiphytic species from Colombia, Ecuador and Peru found at altitudes of 2000 to 3300 meters in the western slopes of the Cordillera Oriental.

DESCRIPTION: A small sized, cold growing epiphytic species from Colombia, Ecuador and Peru found at altitudes of 2000 to 3300 meters in the western slopes of the Cordillera Oriental and blooms in the summer in Bogata' and has ovoid to cylindrical, compressed, unifoliateto trifoliate pseudobulbs with oblanceolate to elliptic-oblong acute or acuminate leaves that blooms mostly in the summer on a erect to pendant, to 20 [50 cm] long, shortly paniculate inflorescence carrying many fragrant, canary yellow flowers and a few interspersed throughout, sterlie star shaped flowers.

FLOWER SIZE: 1 inch [2.5 cm] -- information provided by Jay Pfahl, author of the Internet Orchid Species Encyclopedia (IOSPE).
Other Names
Genus Name Genus Grex Name Year Author
Add+ Oncidium Onc ornithorhynchum 1816 Kunth in F.W.H.von Humboldt
Add+ Oncidium Onc chrysopyramis 1854 Rchb.f. & Warsz.
Add+ Oncidium Onc pyramidale 1845 Lindl.
Most awarded/recent cultivars: Onc. ornithorhynchum 'Cilla' (2 awards in 1991) Onc. ornithorhynchum 'Sellon' (2 awards from 1978 to 1990) Onc. ornithorhynchum 'Sutherland' (2007) Onc. ornithorhynchum 'Clown Alley' (2001) Onc. ornithorhynchum 'Tinonee' (2000) Onc. ornithorhynchum 'Stinky Pinky' (1995) Onc. ornithorhynchum 'Jessica Maree' (1994) Onc. ornithorhynchum 'Pink Delight' (1993) Onc. ornithorhynchum 'Brennon' (1987) Onc. ornithorhynchum 'Royale' (1985) Onc. ornithorhynchum 'Davie Ranches' (1975) Onc. ornithorhynchum 'Jean' (1974) Onc. ornithorhynchum 'Kukoup' (1971)
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