Nectary glands tubular, (2.5-)3-5.5 mm. Adaxial petals 7-11 mm. Gynophores 7-14 mm in fruit.

Flowering early spring-mid fall. Sandhills, prairies, woods, fields; 0-100 m; Ark., La., Okla., Tex.

Subspecies erosa is found primarily in Texas, barely extending into three adjacent states.