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July 19th 79

Stolons Strawberry— (Keep under Stolons)

Placed stolons vertically before S.W window—brig Cloudy, but bright & bright even with some gleams of sunshine, yet tips of 2 stolons whose circumnutation was traced for 2 days were certainly heliotropic— for they advanced to light during day, circumnutating finely & at night drew back from light.—

(in reference to De Vries Apheliotropic) so same plant with intensive light may vary in [view] of Heliotropism.

[Movement in plants, pp. 217-8: "Four stolons still attached to the plant were laid on damp sand in the back of a room, with their tips facing the north-east windows. They were thus placed because De Vries says* that they are apheliotropic when exposed to the light of the sun; but we could not perceive any effect from the above feeble degree of illumination. We may add that on another occasion, late in the summer, some stolons, placed upright before a south-west window on a cloudy day, became distinctly curved towards the light, and were therefore heliotropic."]