The movements and habits of climbing plants

interesting observations on the climbing plants of South Brazil, to which I shall frequently refer.Recently two important memoirs, chiefly on the difference in growth between the upper and lower sides of tendrils, and on the mechanism of the move- ments of twining plants, by Dr. Hugo de Vries, have appeared in the 'Arbeiten des Botanischen Instituts in Wurzburg/ Heft, iii., 1873.