Mechoachàn is a large light root, entirely white at the beginning, but
of a dusky colour above. Some call it _bryonia Indica_, but though it
resembles the bryonia, its plant is a _convolvulus_, and bears
heart-shaped leaves, and small berries. The mechoachàn is well
calculated for gently purging infants; for the powder to which the root
is reduced has no taste, and looks like flour.