GAMOPETALE 173 
grows in meadows and fields in the hedges, and 
occasionally on grass in the open. But a sure place 
to find it is on waste ground and near houses. 
The stems are numerous, decumbent at the base, 
and then erect, quadrangular, hollow, succulent, 
hirsute. The leavesare opposite, cordate, acuminate, 
serrate, on petioles, deflexed, the tips of the teeth 
reddish, incurved, veined. 
The flowers are in whorls containing six to ten. 
The tubular calyx is sessile, ribbed, and has purple 
spots, with short linear teeth. The corolla-tube is 
longer than the calyx, villous within, with a dilated 
throat. 
The White Deadnettle is a foot or more in height. 
Flowers may be found from April to September, but 
it is practically perennial. 
The honey is secreted by the expansion of the 
ovary in the lower part of the tube. 
The upper lip serves as a hood, and hairs within 
effectually protect the pollen from rain. The great 
expansion of the upper lip allows humble bees to 
insert the head. 
Short-lipped insects cannot do this, however, as the 
corolla is contracted below, where there is a ring of 
hairs. Insects alight on the lower lip, projections at 
the side serving as a lever by which they may push 
the proboscis down the tube. The upper lip is con- 
structed so that the pistil and anthers do not yield to 
pressure too readily. This secures the transfer of 
pollen from other flowers. 
