Wittrock, Nordstedt & Lagerheim, Algae Aquae Dulcis Exs.
Wittrock, V.B.; Nordstedt, C.F.O.; Lagerheim, G. [1201 - 1612]

University Herbarium, University of California, Berkeley
Catalog #: UC761189
K. E. Hirn #s.n. 13 July 1898
Pediastrum duplex Meyen
Finland, Ålands landsbygd, Finström, Fenniæ in stagno ad templum par. Finström Alandiæ

Miami University - Algae
Catalog #: 000212020
K. E. Hirn #s.n. 13 July 1898
Pediastrum duplex f. clathratum Arnold & Aleksenko
Finland, Aland (Ahvenanmaa) Alandia (A), in stagno ad templum par. Finström Alandiæ