A. crispa

A. crispa may refer to:


 * Aerides crispa, an orchid
 * Alder crispa, a tree in the birch family
 * Alnus crispa, an alder with a wide range across the cooler parts of the Northern Hemisphere
 * Amphiura crispa, a brittle star
 * Anchusa crispa, a critically endangered species
 * Ardisia crispa, a coralberry
 * Astilbe crispa, a perennial, herbaceous flowering plant