obtusely tetragonous dranches, swelling at the joints, downy. 
Leaves opposite, on short petioles, elliptical, ovate, rather obtuse. 
penniveined, entire, pubescenti-villous. Peduacles short, axillary, 
solitary, two-flowered. Flowers erect, very large, handsome. 
Calyx downy, deeply cut into five, nearly equal, erect, oblong 
segments, at the base bearing several bracts, which are much 
shorter than the calyx, and narrow-ovate. Corolla with the white 
tube scarcely longer than the calyx : upper lip large, ovate, erect, 
emarginate at the apex, white, tipped with purple: Jower lip very 
large, pendent, broadly obovato-cuneate, three-lobed at the apex, 
deep purple, with a white streak down the middle. Stamens two, 
lodged in the concavity of the upper lip. Azthers two-lobed. 
Rudiment of a third stamen, a long subulate filament, hairy at its 
dilated base. Ovary sunk in a deep gland or fleshy cup, ovate : 
style hairy: stigma obscurely two-lobed. 
Fig. 1. Upper lip of the corolla, showing the stamens. 2. Anther. 3. Trans- 
verse section of ovary in its cup. 4. Cup and ovary. 5. Calyx, bracts, and 
pistil :—magnified. 
