Trichostema oblongum, known by the common names oblong bluecurls and mountain bluecurls, is a species of flowering plant in the mint family . It is native to California and the Northwestern United States in Oregon, Idaho, and Washington, and north into British Columbia, Canada. Trichostema oblongum is an annual herb approaching five decimeters (20 in) in maximum height. Its aromatic foliage is coated in glandular and nonglandular hairs. The elongated or lance-shaped leaves are 2 to 4 centimeters (0. 79 to 1. 57 in). The inflorescence is a series of clusters of flowers located at each leaf pair. Each flower has a hairy calyx of pointed sepals and a tubular, lipped purple corolla. The four curved stamens protrude from the lips of the flower.