Encyclia alboxanthina Fowlie 1990 Photo by © Lourens Grobler

Common Name The White and Yellow Encyclia
Flower Size
Found in Bahia state of Brazil at elevations around 800 to 850 meters with elongate, ovate pseudobulbs carrying thick, rigid, erect, mid-green leaves and blooms on a to 32" [ 80 cm] long, several flowered inflorescence with strongly scented flowers
Often cited as a synonym of E pachyantha but I will leave them separate for now.
Synonyms
References W3 Tropicos, Kew Monocot list , IPNI ;