Vervain-Blue

Verbena hastata

Family Vervain (Verbenaceae)
Bloom Summer, fall
Habitat Wet, ditches, roadsides, marshes
Status Native
Cycle Perennial
Height 1-6′
Flower Flowers form on tall, thin spikes 2-4″ long. The single stem branches into multiple spikes at the top. Flowering starts at the bottom of each spike and progresses to the top of the spike. Flowers are blue to deep purple with 5 petals.
Leaf Opposite, long (4-6″) and narrow, pointed and toothed along the margins.
Notes Stems are square, which causes it to be confused with a member of the mint family.

Photos