Stelis argentata (Cultivated- USA)

S. Mexico to S. Trop. America as per WCSP;

Bolivia; Brazil North; Brazil Southeast; Colombia; Costa Rica; Ecuador; French Guiana; Guatemala; Guyana; Honduras; Mexico Gulf; Mexico Southeast; Mexico Southwest; Nicaragua; Panam; Peru; Suriname; Venezuela as per Catalogue of Life;

Orchids seen at the Conservatory in ABG during my visit in October, 2018. 
I missed this one earlier.
Cant confirm from these pics as I cant see open flowers, most of these are buds, but looks close to Stelis argentata.
Thanks a lot for sharing.