[51]

March 20th 1879. Drosera rotundifolia

A plant was placed in front of study window, with light excluded from above & on all other sides— Filaments fixed to back of 3 nearly fully-grown & expanded healthy leaves.

On the 20th (for 24 h) the 2 leaves circumnutated on small scale & moved from light, but they were so placed that divergence from the axis of the plant (& the leaves stood highly inclined) could cause this movement from light; anyhow heliotropism if any did not prevail over the Epinasty. Nor was there any rising at night

[in margin:] The leaves of full-size but not yet depressed so much as ultimately would they go

On the 21st tracing of 3 leaves, more magnified, plants standing in same position with respect to light & to axis of plant— & again in all 3 cases ther was only During the 24° ie night, as well as day only movement from light & from axis of plant, but this movement was strongly zig-zag with some loops due to circumnutation &

Heliotropism & Epinasty (over)

22d 7° 45' a.m. slewed pot, so position of plants reversed & now light (if any action) & divergence from axis will concur.— The result was that continued to diverge, modified by circumnutation, with no trace of rising at night.— I must strike out about Drosera rising at night & add not in the least Heliotropic

[51v]

The tentacles is expanding more a little laterally— so circumnutate