Calanthe pulchra

1 Plant bloom size 

Flower Size 1/2" [1.25 cm] Found in Laos, Thailand, Borneo, Java, Malaysia, the Philippines and Sumatra in humid forests on decaying tree trunks and in deep leaf mold on the forest floor at elevations of 120 to 1700 meters as a medium to large sized, hot to cool growing terrestrial with close set, small pseudobulbs enveloped by leaf sheaths and carrying 5 to 6, elliptic, acuminate, plicate, gradually narrowing below into the elongate petiolate base leaf that blooms in the spring on a 20 to 24" [50 to 60 cm] long, erect, hairless, densely 40 to 110 flowered, racemose inflorescence with large, lanceolate, acute, very concave floral bracts that fall before the odorless flowers open

The small flower and hooked spur are diagnostic for this species.