Pennellia Nieuwl. in Amer. Midl. Naturalist 5(11): 224. 1918 sec. Al Shehbaz 2012
- =Heterothrix (B.L. Rob.) Rydb. in Bull. Torrey Bot. Club 34(8): 435. 1907 syn. sec. Al Shehbaz 2012
- =Lamprophragma O.E. Schulz, Pflanzenr. IV. 105(Heft 86): 298-299. 1924 syn. sec. Al Shehbaz 2012