Oncidium stelligerum Rchb. f. 1873 SECTION Stellata
Common Name The Star-Carrying Oncidium
Flower Size 2" [5 cm]
Found in Guerrero, Jalisco and Michoacan states in Mexico and
northern Guatemala at elevations of 1400 to 1900 meters as a medium
sized, warm to cool growing epiphyte with a ovoid-ellipsoid,
compressed psuedobulbs partially enveloped basally by several,
distichouis, imbricating, leaf-bearing sheaths and carrying 2
apical, elliptic-oblong, subacute, coriaceous, slightly conduplicate
towards the base leaves that blooms in the winter on an axillary,
erect to arching, 34" to 80" [80 to 200 cm] long, several branched
panicle with large, showy, stellate flowers.
Often cited as a synonym of O hastatum but I can see several
differences, I await further references to combine them.