Family, Vervain. Color, violet blue. Calyx, 5-toothed, one tooth being shorter than the others. Corolla, tubular, with spreading border, 5-cleft. Flowers, in spikes, sessile, small, narrow, on erect, 4-sided stems, 3 to 7 feet high. Leaves, petioled, oblong to lance-shape, sharply pointed at apex, the lower often lobed or halberd-shaped, serrate with sharp teeth. June to September.
In low grounds, borders of swamps, moist fields and meadows in all the Eastern States and westward to New Mexico.
The vivid blue of this tall plant makes it a conspicuous fall flower. It would be pretty were the flowers all to blossom at once; but buds above, seeds below, a small circle of bloom between is its parsimonious habit.
The vervain (verbena) seems to have been connected with magic, acting as a charm against witches. Says Mr. Knight. in his biography of Shakespeare:
"Some of the children said that a horseshoe over the door, and vervain and dill, would preserve them, as they had been told, from the devices of sorcery." (Sec illustration, p. 332.)
V. angustifblia. - Color, purple or blue. A low plant with slender stem, 1 to 2 feet high. Leaves, linear or lance-shape, tapering into short petioles, serrate. Spikes of flowers crowded, single, terminating the branches. Fruits quickly follow the flowers, overlapping one another. July and August.
Blue vervain (Verbena hastata)
Color, purplish. Flowers, small, with the 2-lipped corolla in long, thread-like spikes which at first are short, but grow to 4 or 5 inches in length. Leaves, the upper long, narrow, acute, sessile, entire; lower pinnately cleft into 3 lobes, which are much cut and toothed, with margined petioles. Stem, square, 1 to 3 feet high, much branched. June to September.
Vervain. (Verbena officinalis).