Monochaetum floribundum (Schltdl.) Naudin in Ann. Sci. Nat., Bot., sér. 3. 14(2): 165. 1850 sec. Almeda 2009
- =Rhexia floribunda Schltdl. in Linnaea 13: 431–432. 1839 syn. sec. The Plant List 2013
- =Monochaetum rivulare Naudin in Ann. Sci. Nat., Bot., sér. 3. 4: 50. 1845 syn. sec. The Plant List 2013
- =Monochaetum diffusum Cogn. in Bot. Gaz. 16(1): 4. 1891 syn. sec. The Plant List 2013
- =Monochaetum compressum Gleason in Bull. Torrey Bot. Club 65(8): 577. 1938 syn. sec. ???