Marina gracilis Liebm. Marina gracilis Liebm., Vidensk. Meddel. Naturhist. Foren. Kjobenhavn 1853: 103. 1853 sec. Barneby 1977=Parosela delicata Rose, Contr. U.S. Natl. Herb. 8: 304. 1905 syn. sec. Barneby 1977