Abstract
THE only important paper in the Nuovo Giornah Botanico Italiano for April is an elaborate one by Signor G. Paoletti on the movements of the leaves of Porlieria hygromclrica. The structure of the plant is described in detail, and especially the anatomy of the “motor nodes” of the leaves and of the leaflets. He distinguishes in them two kinds of tissue, a motor system and a passive system. The cause of the movements appears to reside in the protoplasm and in the osmotic properties of the cell-sap. The author is unable to find in the leaves any hygro-metric properties, the supposed presence of which was thereason for the specific name of the plant. The paper is illustrated by four plates.
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Scientific Serials. Nature 46, 90 (1892). https://doi.org/10.1038/046090b0
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DOI: https://doi.org/10.1038/046090b0