Flowers appear in clusters at
the axlls of the leaves about two-thirds of the
way up the stem, which is crowned by several
leafy stems. Pink flowers have a saucer like
corolla with indentations into which fit the
stamens until they are disturbed, whereupon they
are sprung toward the center of the flower,
distributing the pollen in the process.
Opposite, lanceolate leaves, the
undersurface a somewhat lighter shade of green
Toxic substance
which is injurious to animals, especially sheep
