Trichostema lanceolatum, with the common names vinegarweed and camphor weed, is an annual flowering herb of the mint family native to western North America.

[1] California habitats it grows in include: chaparral; coastal sage scrub; and Northern, Southern, and Foothill oak woodlands.

The bilaterally symmetrical flowers, of pale blue to purple, are in long clusters in leaf axils on short green stems.

When a pollinating insect alights on the lower lobes of the corolla, and inserts its mouth parts into the nectar-containing lower section of the same tube, the narrow corolla portion above is straightened and snaps rapidly downward brushing pollen onto the insect's back.

[7] The indigenous peoples of California used this as a traditional medicinal plant, as a cold and fever remedy, a pain reliever, and a flea insect repellent.