Fig. 10.

Leaf movements after surgical intervention at the pulvinus of a leaf of C. ensiformis. The leaf trace P51 is from an intact plant grown in a greenhouse. P50 is from a leaf where the extensor has been removed: the leaf lamina remains motionless in the ‘up’ position (broken line). P50′ is the trace from the opposite sibling leaf of P50, but here the flexor has been cut away: the lamina is mainly in the ‘up’ position but is still capable of movement. Correspondences between rates of leaf movement δL and rates of change of the Etide time course δ(δg) are shown in the lower panels. Other conventions are as for Figs 1 and 2. Leaf movements redrawn from figs 17 and 18 in Brouwer (1926).