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Ch X.     Apogeotropism     9.

more probably, when (as sometimes occurred with some of the very sensitive hypocotyls of Brassica & Beta, the stems of lucurbita  evisera and the cotyledons of Phalaris)  after the part in question after bending up in a straight course abruptly being suddenly they began to circumnutate to the its full extent and in its usual manner.

A fairly good instance of a sudden change of this kind from a nearly straight course movement upward course to one of circumnutation is shown in Fig 214 183; but more striking instances I mention occurred with the specimens specimens of was occasionally observed with Beta, with Brassica & Phalaris.) When on the other hand, the upward apogeotropic course is zig-zag, we may infer from the many cases given in our previous chapters, that we have a modified form of circumnutaton.

(We will now describe a few first a few cases in which it may be seen observed how gradually circumnutation becomes changed into apogeotropism, under circumstances to be specified in each instance.

Rubus idaeus (hybrid): a young plant growing vigorously in a pot, 11 inches in height growing in a pot was placed horizontally & its upward movement was

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