Hennings, Paulus Christoph (1841-1908)
PHYKOTHECA MARCHICA, SAMMLUNG GETROCKNETER ALGEN AUS DER MARK BRANDENBURG.
Fascicles I-II, numbers 1-100. Berlin, 1893-1906.
Specmens dried on paper or glass. Index information was derived from herbarium sheet labels.

Meridion circulare (Greville) C. Agardh
Meridion constrictum Ralfs
Germany (East Berlin) Pankow
Hennings 50

Gomphonema olivaceum (Kützing)
Germany (Franfurt) Chorin
Hennings 100