[70]

Phaseolus Roxburghii May 15th 1880

The A second trifoliate leaf now formed, & the elongated first unifoliate leave whi now stood at noon horizontally, or declined beneath horizon. One seedling at noon had these leave 26° beneath horizon & at 10' 15' P.m, they had risen 20° above horizon (& on following morning at 7° am) were again horizontal)— so they rose 46°. The 3 leaflets on the second trifoliate leaf hung down vertically at night, whereas at noon all 3 had been extended in the same plane.

29

Ch X.)

Burying of seed-capsules

On the burying of seed-capsules.— One observation on this subject was made at a time when we cared were interested solely with the question how far various kinds kinds of movement consisted of modified circumnutation. We therefore neglected to observe determine, though this might easily have been done, without much difficulty, whether the downward movement by which certain capsules bury themselves was excited by geotropism or by apheliotropism.

That it was not caused by epinasty is almost certain, as the peduncles &c arising from branches, which naturally occupied or were fixed in various positions, & yet the parts under observation all always directed themselves straight down to the ground.