. Dr. L. Rabenhorst's Kryptogamen-Flora von Deutschland, Oesterreich und der Schweiz . h d Nitella gracilis (Smith) Ag. a f. normalis, nat. Gr.; h Blatt, Vergr. 5; e End- glied, Vergr. 25; d Spitze, Vergr. 75; e Kern, Yergr. (iO; f Kernmembran, Vergr. 500. Migula, Characeen. J \

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