Oncidium

Finding

SITF has determined this plant to be Trichocentrum divaricatum (Jan 2026). Oncidium robustissimum is considered to be a synonym of T. divaricatum by Kew POWO. The flower size and form matches T. divaricatum. It also matches the images of T. divaricatum in Mark Chase's Pictorial Oncidium Book. This plant is a very close match to the photo of T. divaricatum as Oncidium robustissimum in the IOSPE.

Number Of Leaves Per Growth Or Cane: 24.5 cm

Leaf Length: 21.5

Leaf Width: 5.5cm

Leaf Shape: lancelot

Pseudobulb Length: 4.0

Pseudobulb Width: 4.0

Pseudobulb Distance: 1.1 cm

Pseudobulb Root Tip: green at tip then white from there back

Inflorescence Overall Length: 37 cm

Inflorescence Arrangement: single branched inflorescence

Inflorescence Dist Base To Bud: 20.5 cm

Inflorescence Dist Bet Flowers: 2.5 to 3.0 cm

Inflorescence Dist To Sepal: 2.1 cm

Flower Natural Spread Length: 3.7

Flower Natural Spread Width: 3.6

Dorsal Sepal Length: 1.80

Dorsal Sepal Width: 1.0

Lateral Sepals Length: 1.9

Lateral Sepals Width: 0.9

Petals Width: 1.1

Judging Center: Chicago

Award Number: 20252672

Award Date: December 13, 2025

Awarded As: HCC

Bought plant from Santa Barbara Orchid estate about 5 years ago and it blooms regularly in the fall. More information is on the pictures. I am not sure you got all of these pictures as I do not know how to bulk add and drop them. I can send photos separately and also have photos of the score sheet.
Please let me know what else you need.
Larry

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Learn more about the Oncidium genus