Nitella capitata (Nees) C.Agardh
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)
Groves, H. & Groves, J. (1885). Nitella capitata Ag. in Cambridgeshire. Journal of Botany 23: 185.
M.C.Choudhary (1970). Nitella capitata (Ness) Ag. var. americana var.nov. from the southeastern United States. Phykos 9: 86-88.