| Trichostema laxum | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Lamiales |
| Family: | Lamiaceae |
| Subfamily: | Teucrioideae |
| Genus: | Trichostema |
| Species: | T. laxum |
| Binomial name | |
| Trichostema laxum A.Gray |
|
Trichostema laxum is a species of flowering plant in the mint family known by the common name turpentine weed. It is native to northern California and Oregon, where it grows in coastal and inland mountains and foothills, sometimes on serpentine soils. It is an annual herb approaching half a meter in maximum height, its aromatic herbage coated in glandular and nonglandular hairs. The elongated or lance-shaped leaves are up to 7 centimeters long. The inflorescence is a series of clusters of flowers located at each leaf pair. Each flower has a hairy calyx of green or reddish sepals and a tubular, lipped purple corolla. The four stamens are long and curved, measuring up to 1.6 centimeters in length.