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Oncidium ornithorhynchum
Oncidium species (Oncidiinae)
At‑a‑glance
- Group/Class: Oncidium species (Oncidiinae)
- Height × spread: 8 to 16 in tall including spikes (20 to 40 cm); 8 to 12 in wide (20 to 30 cm)
- Bloom window: autumn to spring; varies by climate
- Color & flower form: pale pink to lilac sprays on branched stems with many small flowers
- Fragrance: 3 strong
- USDA hardiness: grown as houseplant in most of North America; outdoors year round only in zones 10 to 12
- Breeder / Year / Origin: unknown, 1815, Mexico to Central America
- Pet safety: safe
How it differs
- Pink flowers instead of the typical yellow.
- Strong fragrance compared to many species.
- Compact habit for small spaces.
Strengths
- Free flowering once established.
- Multiple spikes on mature plants.
- Adapts to indoor culture with good light.
Care in one minute
Site: bright indirect light; avoid harsh midday sun.
Medium: fine bark with perlite; fast drainage; slightly acidic.
Water: keep evenly moist in growth; allow a brief drydown between waterings.
Feed: quarter strength fertilizer every 2 to 4 weeks in growth; reduce in winter.
Watch‑outs
- Sources differ on identity and naming.
- Buds can blast if humidity drops.
- Leaves scorch in hot direct sun.
Best uses (tags)
Provenance note
Name is accepted by Kew. Many growers apply the name to plants also treated as Oncidium sotoanum; usage differs among references.
References
- Kew – POWO, Oncidium ornithorhynchum
- RHS – Oncidium ornithorhynchum plant details
- IOSPE – Note on name usage for O. ornithorhynchum
- American Orchid Society – Oncidium culture sheet
