Protologue Description: S. ATROVIRENS Muhl., var. GEORGIANUS (Harper) Fern., forma angustispicatus, f. nov., spiculis anguste cylindricis ad 1 cm. longis. TYPE: wet shore of Housatonic River, Newtown, Connecticut, August 17, 1928, E.H. Eames, no. 10,692 (in Herb. Gray.).