[150 and 151]

Carnation, circumnutation & epinasty of Leaf F126

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(Dianthus caryophyllus: circumnutation of young leaf, immediately after diverging from its original almost vertical position. Here Traced on vertical glass, from 10° 15' P.m on June 15th 13th to 10. 35' P.m on the 16th Apex of leaf 8 3/4 of inch from glass, so tracing not greatly exaggerated. Illuminated from above.

Temp. 15 1/2 to 17 1/2 C. —) At the close of the observations the leaf was 5 1/4 inches in length

[151v]

30 641

Chap. E 10

in the ratio of 100 to 61.

Ajuga reptans (Labiateæ) set a good many seeds; but none of the stems under a net produced so many as several uncovered stems growing closely by.

Euphrasia officinalis (Scrophulariaceæ), covered-up plants produced plenty of seed; whether less than the exposed plants I cannot say. I saw two small Dipterous insects (Dolichopos nigripennis & Empis chioptera) repeatedly sucking the flowers; and as they crawled into them, pushes they rubbed against the bristles which project from the anthers, and became dusted with pollen.

Veronica agrestis (do) covered-up plants produced an abundance of seeds. I do not know whether any insects visit the flowers; but I have observed Syrphidæ repeatedly covered with pollen visiting the flowers of V. hederæfolia and chamoe ædrys.

Mimulus luteus (do) highly self-fertile.

Calceolaria (greenhouse var.) (do) do

Verbascum thapsus (do) do