unknown oncidium species

[weederwoman]

Can anyone help me I.D. this species oncidium. Probably collected in Mexico pre-1970. Hope there are not a number of species that are nearly identical. They all look quite similar to me, esp. if species are variable.
Thanks
Laurel

https://www.flickr.com/photos/tonzi/14179945996/

[WhiteRabbit]

Oncidium sphacelatum, perhaps?

[Fairorchids]

We need pics of the plant and the complete scape too.

[weederwoman]

I took some more photos today. Hope these help. It's a very large, very old plant that long ago ate its mount.

https://www.flickr.com/photos/tonzi/

thanks Laurel

[Fairorchids]

I don't know this species. It sort of looks like sphacelatum, except that sphacelatum is larger, has smaller flowers, and spikes with 75-150 flowers.

I will send you a PM with an email address of someone, who knows Oncidiums well.

[weederwoman]

Thank you so much. Laurel