. Dr. L. Rabenhorst's Kryptogamen-Flora von Deutschland, Oesterreich und der Schweiz . Nitella gracilis (Smith) Ag. a f. elongata, b f. robustior, c f. divari- cata, d f. heteromorpha, c f. conglobata. Sämintlich um di« Hälfte verkleinert.

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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1900, bookyear1900