The leaves are usually opposite,
simple, and in many species hairy, often densely so. The flowers are small,
with five petals, and borne in dense spikes. Typically some shade of blue,
they may also be white, pink, or purple.
The plants blooms in early to mid-summer into late fall, producing small,
fragrant, blue, purple, pink to mauve (sometimes white) colored flowers.
Since this plant flower for long periods of time it is a good choice for
attracting butterfly's. They are valued in butterfly gardening in
suitable climates, attracting Lepidoptera such as the and also
hummingbirds, especially Common Vervain, which is also grown as a honey
Can tolerate damp soil up to several inches of water. Grows
in clumps or bunches and can get 3 to 5 feet in height