This southeastern species (2n = 42) of lowland woods was first collected from HICK on low slopes above Three Ponds by L. McKinney (VDB; KSNPC database). There are also colls. from MARS (APSC, D. Estes et al., 29May2014) and BALL (EKY, M. Evans #7616). No coll. has been located to support Cranfill's (1991) record from HARD, which is more dubious. C. crebriflora is scattered across Tenn. and Va., including some counties close or adjacent to Ky. The fusiform perigynia of crebriflora resemble those of laxiflora, styloflexa and striatula, except that their apices are erect (versus more or less curved) and they are ascending in the spikes (versus spreading). Its distal spikes are overlapping (versus separate), equalling or exceeding the terminal staminate spike (versus clearly exceeded). Also, lower peduncles arise at least half way up the culm (versus in the lower third).