Was Pflanzen wissen

3, Nr. 24 (1868), Tafel 5720.
    (22) USDA-NRCS PLANTS Database / A. S. Hitchcock, überarbeitet von Agnes Chase, Manual of the Grasses of the United States , USDA Miscellaneous Publication Nr. 200, Washington, D.C. 1950.
    (23) Übernommen aus: Charles Darwin, The Power of Movement in Plants , London 1880 (dt. Das Bewegungsvermögen der Pflanzen , Stuttgart 1881), Abb. 6.
    (24) USDA-NRCS PLANTS Database / USDA Natural Resources Conservation Service, Wetland Flora: Field Office Illustrated Guide to Plant Species .
    (25) Varda Wexler.
    (26) USDA-NRCS PLANTS Database / Nathaniel Lord Britton und Addison Brown, An Illustrated Flora of the Northern United States, Canada, and the British Possessions , 3 Bde., New York 1913, Bd. 2, S. 436.
    (27) USDA-NRCS PLANTS Database / Nathaniel Lord Britton und Addison Brown, An Illustrated Flora of the Northern United States, Canada, and the British Possessions , 3 Bde., New York 1913, Bd. 3, S. 497.
    (28) USDA-NRCS PLANTS Database / A. S. Hitchcock, überarbeitet von Agnes Chase, Manual of the Grasses of the United States , USDA Miscellaneous Publication Nr. 200, Washington, D.C. 1950.