Habitat: Growing attached to submerged rocks in cold feeder creek
Locality: St. Francois State Park ca. 5 mi. NE of Bonne Terre on U.S. 67. cold feeder creek into Coonville Creek
Habitat: submerged to emergent, in cold, spring-fed feeder stream
Locality: St. Francois State Park ca. 5 mi. NE of Bonne Terre on U.S. 67; spring-fed feeder stream into Coonville Creek.