Clarkia australis
 Clarkia australis is a species of flowering plant in the evening primrose family known by the common name Small's southern clarkia. It is endemic to California where it grows in the forests of the central Sierra Nevada. It is an uncommon species threatened by such forest activities as logging. This annual herb produces a slender erect stem approaching a meter in height. The leaves are widely linear in shape and borne on short petioles.