Migula, Sydow & Wahlstedt, Characeae Exs.
Migula, E.F.A.W.; Sydow, P.; Wahlstedt, L.J. [1 - 150]

The New York Botanical Garden
Catalog #: 2011671
P. Sydow #[s.n.] 17 July 1899
Chara baltica variety densa Mig.
Germany, ins. Rugia, "Zicker See"