Stachys chamissonis is a species of flowering plant in the mint family known by the common name coastal hedgenettle. It is native to the west coast of North America, where it grows in moist coastal habitat from Alaska to central California. This mint produces an erect stem well over one meter in maximum height, and often over two meters. It is hairy, glandular, and aromatic. The oppositely arranged leaves have pointed, wavy-edged blades up to 18 centimeters long which are borne on petioles. The hairy, glandular inflorescence is made up of interrupted clusters of up to six flowers each. The flower has a deep pink tubular corolla which can be over 3 centimeters long. The corollas are borne in hairy calyces of purple or purple-tinged sepals.