Derscr. Root annual. Stem erect, but weak, much branched 
with opposite square branches, the lower ones spreading. Leaves 
opposite, petiolate, ovate, acuminate, approaching to cordate, 
coarsely serrated, downy or slightly hairy, as is nearly the whole 
plant, more or less. Peduncles axillary, solitary, single-flowered 
or terminal, and more or less clustered, often three together, and 
thus the middle is frequently a three-flowered raceme, always 
shorter than the leaves, or only in fruit elongated, the same length, 
or longer than the leaves, and refracted. Calyx ovate, plicate, so 
as to appear winged at the angles, two-lipped, glabrous. Corolla 
with the tube inflated above, almost wholly included in the calyx, 
green, tinged with purple. Limé of five, nearly equal, rounded 
lobes, yellowish-white, variegated with pale purple, two upper 
lobes (forming the upper lip) standing forward and the apices a 
little incurved when perfect (not well represented in our figure) ; 
lower lip three-lobed, the two lateral lobes each with a deep purple 
blotch. ‘Two inferior stamens included; the two upper ones 
exserted. Ovary oblong, arising from a glandular disc or ring. 
Style geniculated at the base. Stigma two-lipped, downy. 
Fig. 1. Portion of the tube of the corolla with the stamens. 2. Pistil. 
