This is centered in the lower Mississippi Valley. Colls. from HARD (UC, ?KY; see Cranfill & Thieret 1981) and ROWA (MDKY) have been verified but are now mislaid or awaiting accession, and should be rechecked. The more western records from CARL, GRAV and MCRA are reliable (EKY, WKY). C. triangularis differs from other Multiflorae in its perigynia, with relatively short abrupt beaks, usually greater width (ca. 2.5-3 mm wide versus 1.3-2.6 mm), and development of "crystalline inclusions" that become reddish when mature (F, FNA 23).