Opuntia ammophila Small, J. New York Bot. Gard. 20: 29, plate 224. 1919; O. compressa (Salisbury) J. F. Macbride var. ammophila (Small) L. D. Benson

Shrubs or small trees, erect, to 2 m, often with short trunk, usually oval in cross section. Stem segments firm.

Flowering spring-summer (Feb-Aug). Sand dunes, scrub woodland flats; 0-60 m; Fla.

Opuntia humifusa var. ammophila is poorly known and needs additional ecologic, taxonomic, and molecular study. The distribution given follows L. D. Benson (1982).