Is this Oncidium varicosum?

[pheli]

The plant was imported from Brazil and labeled as Oncidium varicosum. It is in flower now but the blooms look quite different from these images on the internet. Is this a variety of varicosum or just mislabeled?

[Frdemetr]

Pheli,

Yes, it's a Oncidium varicosum, probably var. rogersii. Onc. varicosum is quite variable, but yours is more or less typical (you can see one like yours in my gallery). A good source is "Orchidaceae Brasiliensis"; follow this link http://www.dalholl.hpg.ig.com.br/gen...varicosum.html

[Rosim_in_BR]

Pheli, I agree with Frederico your plant seems to be Onc. varicosum. Like he says, this species has somewhat variable flowers, but the pseudo bulb is a good way of clearing any possible doubt that has left. Take a look at one; varicosum has it ribbed and the surface is rough to the touch. The roughness is due to minuscule warts (varicosum = warty) that cover the pseudo bulb. Another frequently seen characteristic are small black stains scattered on the surface of the bulbs. Hope this helps you.

[cb977]

Great information, guys!

[pheli]

Thanks a lot, Frederico and Mauro.
The surface of their pseudobulbs are indeed rough and black-dotted . I will take another picture of their pseudobulbs some other day.