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

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Orchid Species: Oncidium macrum

Kew currently accepted name is Cyrtochilum densiflorum

Oncidium macrum is an orchid species identified by (Lindl.) Beer in 1854. Culture information and photos for this orchid are commonly detailed under the currently accepted name of Cyrtochilum densiflorum.
Genus
Oncidium (Onc.)
Grex
macrum
Parents
Species
Author
(Lindl.) Beer
Year
1854
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ORIGIN: Found in Venezuela, Colombia and Ecuador in paramo at elevations around 2600 to 3500 meters.

DESCRIPTION: Medium sized, cold growing terrestrial with oval to rounded, compressed pseudobulbs enveloped basally by leaf-bearing sheaths and carrying 2 apical, lanceolate, very narrow, conduplicate below into the petiole-like base leaves that blooms in the spring and summer on an axillary, erect, 4' [120 cm] long overall, peduncle 28 to 32 [70 to 80 cm] long, paniculate, rachis 12 to 14 [30 to 35 cm] long, severalflowered inflorescence arising on a mature pseudobulb and carrying fleshy flowers.

FLOWER SIZE: 3/4 inch [2 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 densiflorum 1854 (Lindl.) M.W.Chase & N.H.Williams
Add+ Cyrtochilum Cyr densiflorum 1917 (Lindl.) Kraenzl.
Add+ Cyrtochilum Cyr macrum 1917 (Lindl.) Kraenzl.
Add+ Cyrtochilum Cyr posadarum 2003 (Königer) Senghas
Add+ Cyrtochilum Cyr ramulosum 1917 (Lindl.) Kraenzl.
Add+ Cyrtochilum Cyr robustum 1917 (Rchb.f. & Warsz.) Kraenzl.
Add+ Odontoglossum Odm macrum 1852 Lindl.
Add+ Odontoglossum Odm posadarum 1996 Königer
Add+ Odontoglossum Odm ramulosum 1852 Lindl.
Add+ Odontoglossum Odm robustum 1854 Rchb.f. & Warsz.
Add+ Oncidium Onc ramulosum 1854 (Lindl.) Beer
Add+ Trigonochilum Tgc robustum 1997 (Rchb.f. & Warsz.) Senghas in F.R.R.Schlechter
Add+ Odontoglossum Odm densiflorum 1846 Lindl.
Add+ Trigonochilum Tgc densiflorum 1997 (Lindl.) Senghas in F.R.R.Schlechter
Most awarded/recent cultivars: Odm. ramulosum 'San Damiano' (1997)
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