This is widely scattered in eastern states, but most frequent on relatively base-rich soils in the lower Mississippi River watershed (FNA 23; W). It is close to stipata and sometimes confused (2n = 52 in both); see notes under stipata var. maxima. C. crus-corvi differs in its long-beaked perigynia (up to 6-8 mm versus 4-6 mm), with clearly distended bases when mature; also, sheath fronts are smooth and often finely red-dotted (versus rugose but not red-dotted). Compared to typical stipata, crus-corvi is relatively robust and distinctly glaucous.