Plants to 30 dm. Stems: pseudobulbs aggregate, suborbicular, strongly flattened, 2.5-3.8 × 1-3 cm, smooth, glossy. Leaves 1-3, oblanceolate, 6-18 × 1-3.5 cm, apex obtuse to acute. Inflorescences racemes, to 25 cm; sheath conduplicate, elongate. Flowers 12, resupinate, simultaneous, greenish tan with reddish purple blotches; sepals oblanceolate, 1-1.4 × 3-3.5 mm, apex acute; petals similar, somewhat smaller, 1-1.3 × 1-2 mm; lip white to pale green, occasionally marked with magenta, rhombic to obscurely 3-lobed, 10 × 6-7 mm, lateral margins revolute; callus 3-dentate, middle tooth extended into thickened termination near apex of lip; anthers 3, middle anther with 4 pollinia, laterals with 2 each, yellow; column green at base, white distally, apex 3-toothed with smaller tooth in each sinus, 6-7 mm. Capsules 2.5-3 × 1.5-2 cm.

Flowering Jul--Sep; fruiting Nov--Dec or throughout year. In hammocks and thickets, on small trees; 0--30 m; Fla.; West Indies (Bahamas).

The autogamous, 3-anthered Prosthechea boothiana var. erythronioides is the only variety found in Florida, probably because of the absence of a pollinator. Throughout the rest of the distribution of the species, the 3-anthered plants seldom occur. As most other autogamous tropical orchids in Florida, it has been able to survive there only because of the self-pollinating feature. The 1-anthered variety, var. boothiana, occurs in Cuba, Bahamas, Mexico, and Belize.