This is shrubby and usually has many stems, from two to four feet high, with stiffish leaves, dark green on the upper side, paler and woolly on the under, the margins rolled back, and beautiful flower-clusters, which are sometimes a foot long. The bright blue corolla is nearly an inch long, with a border shaped like a violet, the smaller buds are pink, and the purple stamens and style are two inches long and very conspicuous. The calyxes, stems, and buds are all covered with fuzzy, pink wool, forming a most unusual and beautiful color scheme, giving a changeable almost iridescent effect of mauve and pink, in remarkable contrast to the brilliant blue of the flowers. This grows on rocky hills in southern California, is pleasantly aromatic and used medicinally by Spanish-Californians. T. lanceolatum is called Camphor Weed, because of its strong odor, like camphor but exceedingly unpleasant. It grows on dry plains and low hills in the Northwest and is an important bee-plant, blooming in summer and autumn, and is also called Vinegar Weed.
There are a few kinds of Agastache, all North American, perennial herbs, mostly tall and coarse; leaves toothed, with leaf-stalks; flowers small, in a terminal spike, with bracts; calyx bell-shaped, with five teeth and slightly two-lipped; corolla with a two-lobed, erect, upper lip, the lower lip spreading and three-lobed, the middle lobe broader and scalloped; stamens four, all with anthers, the upper pair longer; nutlets smooth. The Greek name means "many spikes."
Romero- Trichostema lanatum. MINT FAMILY. Labiatae.