Disa cooperi Rchb.F.

Plants erect, robust, 400-700 mm tall; sterile shoot 50-100 mm tall, basal sheaths 2-4, leaves 2-5, usually conduplicate; fertile shoots: cauline leaves 6-15, imbricate, basal 1 or 2 are 10-50 mm long, remainder lanceolate, grading into the floral bracts. Inflorescences imbricate, 20-50-flowered; bracts 20-40 mm long, apex usually deflexed. Flowers c. 15 mm in diameter, facing downwards at 45°, white or cream with green lips. Median seªpal subacute, galea 9-12 x 5-7 x 4-6 mm deep, oblong in outline, upper margin incurved; spur horizontal, slender, straight or somewhat decurªved, apically somewhat inflated, 35-45 mm long; lateral sepals completely reflexed at anthesis, obªlong, 10-14 x 6-8 mm, apiculi up to 2 mm long. Petals erect, mostly included in galea, posterior part curved to close the spur entrance, broadly oblong, obtuse, with blunt tooth at the front, 7-10 x 3.5-4.5 mm. Lip pendent, 9-13 mm long, broadly spathulate with a short claw c. 3 x 2 mm, blade deltate, 5-10 mm wide, margins more or less serrate. Anther 3-4 mm long; stigma stipitate; lateral rostellum lobes parallel (.