It is curious that the vervain, or verbena, employed by brides for centuries as the emblem of chastity, should be one of the notorious botanical examples of a willful hybrid. Generally, the individuals of distinct species do not interbreed; but verbenas are often difficult to name correctly in every case because of their susceptibility to each other's pollen - the reason why the garden verbena may so easily be made to blossom forth into whatever hue the gardener wills. His plants have been obtained, for the most part, from the large-flowered verbena, the beautiful purple, blue, or white species of our Western States (V. Canadensis) crossed with brilliant-hued species imported from South America. MAD-DOG SKULLCAP or HELMET-FLOWER; MAD-WEED; HOODWORT (Scutellaria lateriflora) Mint family Flowers - Blue, varying to whitish; several or many, 1/4 in. long, growing in axils of upper leaves or in 1-sided spike-like racemes. Calyx 2-lipped, the upper lip with a helmet-like protuberance; corolla 2-lipped; the lower, 3-lobed lip spreading; the middle lobe larger than the side ones. Stamens, 4, in pairs, under the upper lip; upper pair the shorter; one pistil, the style unequally cleft in two. Stem: Square, smooth, leafy, branched, 8 in. to 2 ft. high. Leaves: Opposite, oblong to lance-shaped, thin, toothed, on slender pedicles, 1 to 3 in. long, growing gradually smaller toward top of stem. Fruit: 4 nutlets. Preferred Habitat - Wet, shady ground. Flowering Season - July-September. Distribution - Uneven throughout United States and the British Possessions.