(1

Oxalis corniculata

F thinks that I have used some of these notes.

C.D says that by measuring with a pair of compasses it was clear that the chief zone of growth was between the pulvinus & the lamina; & the same thing is evident from the microscopic examination it is due to the cells above the pulvinus le growing in length much more than those below.

The youngest cotyledon examined which was dissected out of the seed coats has no trace of a joint. The cells on the upper surface of the petiole were in 7 in a longitudinal row averaging 7° of the micrometer (0.021mm) in length. These cells are thus slightly larger longer than the small cells in perfectly developed pulvinus ie 4°- 6° of the micrometer (0.012mm-0.018mm). So that a certain amount of cell division must take place before the cells go into the stationary condition & become pulvinus cells. In this stationary condition they continue to grow in width & these keep equal in width to the ordinary cells above & below the pulvinus

If one measures all the cells in a longitudinal row including on a petiole which has a pulvinus, they are as follows 46, 35, 30, 20, 12, 8, 7, 7, 15, 15, 20, 22, 25, 15, 25

[1v]

[page crossed]

Tribe 3—

Trigonella cretica — The leaflets move upwards, the terminal one coming against the edges of the two lateral leaflets whose surfaces touch each other.

2

Oxalis corniculata

Thus if one starts from the pulvinus the cells get longer & longer as one travels in either direction I though this was a proof that cells continued to formed one after the other at the pulvinus, so that those nearer the pulvinus are younger & therefore shorter than the older cells further from the pulvinus. But I am not sure that it is a proof—

There is a note which I believe you asked me to write down that some seedlings in a bed of O. corniculata did not go to sleep—

[calculations not transcribed]

[2v]

[page crossed]

Leguminosæ

Tribe 3

Trigonella cretica. The middle one of the three leaflets turns vertical & presses against either Rt or Left lateral leaflet.

Tribe 4

Securigera coronilla

Tetragonolobus purpureus 3 leaflets which shut upwards

Tribe 5

Astra