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Lathyrus nissolia, seed from Kew

Nov. 20th 73 in Hot house

N.B. This plants & common Bean, each a rudiment & each 2 leaflets

(Can this C. be some distinct plant as well as B)

[sketch] C Black Red wool These seem to have reddish axes many up to first leaves —  All other are of same colour for short space above ground.

5—6 inches [sketch] B2 stipule stipule stip white wool

These little leaflets have bloom on them

Height above ground to tips of highest leaf 2 1/2— to 2 3/4 inch or 3 inches.

[sketch] A Bud.

I think this only true leaf

(cotyledons embedded) Common form.

Nov. 20 B each leaflet has short sub-petiole & between them, rather beneath there is a small conical projection which may well represent a tendril. — Examine this.—

I see no evidence that rubbing with needle causes any movement of axes or leaves

Nov. 26th The little point between leaflets quite sharp rather flattened in the same plane — (transversely) as are the leaflets— coloured red on under sides, & some red colour runs to under side in streaks the 2 leaflets— Length about a little less than 1/20' of an inch more accurately 1/40 + 3/4 / 40 = 7/40 4/160

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Window

N. Eastern Study

Light

day cloudy

B

Apex of 2 Leaflet in abnormal specimen.

Nov. 21d 

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3

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7º 30' am.

Nov. 22d—

8º 25' a.m         

  A

Nov. 21st

1

2

3

4

5

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7'

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9

10

Nov' 21

C

Nv 22'

Nov 22d

B

Nov. 22d

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2.

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7           

A

  Nov. 22

C

Nov. 22'

 

Lathyrus nissolia

The stem was tied up so that no movement of axis

Nov 21st I placed the pot of seedlings between 2 Boxes with glass plate over & mark on soil & observed movement of of apex of one of 2 leaflets in abnormal plant marked B in last page & on tracing. The leaf (see diagram moved in irregular line to light all day till about midday from 9º 25' A.m. to 12º 15' & then from light till 8º 25' it continued to move from light all night. (N.B it pot occupied same relative position in Ho warm greenhouse)— Next day Nov. 22d (B in diagram,) it moved from light from 7º 30', to 8º 25' then to N.W. then to N.E until 11º 34'; then from light till about 1º & then to S.E. & made one irregular circle.— I certainly think the leaves revolve, but much influenced by light.

Plant A of diagram tip of nearly straight grass-leaf observed— made an open ellipse during same period, from N W. to S.E. moving a little to light in morning & from it in afternoon & opposed to course of sun.— Next Morning from 7º 30 to 8º 35' moved from light (as in last spec.) & all rest of day moved in irregular course to light.

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Nov. 21 & 22d

Lathyrus nissolia No some tendril-bearing Plant

Fig C. of Diagram — was tip of young grass-like leaf with apex much hooked— moved during 21' to & from light in very irregular course & next morning continued to move from light & afterwards in small complex figure.

On the whole I conclude movements cannot be accounted for simply by light— There must I think be some spont. revolving movement.—

Dec. 31st I observed both plants with plate of glass over in cool HotHouse— Plants about between 5 & 6 inches high.—

I made first red dot at 9º 47' a.m. & the ninth dot at. 4º 6' P.m. The first leaf of L. nissolia nearly vertical leaf made stretched nearly horizontally, across field it first moved a little to the light & then to right hand side parallel to light, & then returned back. (with a abrupt flexure in middle of course to the light)) to nearly spot from which it started— When the sun shone the leaf moved quickly & began returning when sun grew dim.— I do not think a true spont. movement

The 2d leaf of L. nissolia was nearly vertical horizontal: it moved in

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direct line to light, & moved quickly when sun shone & then moved backwards during whole afternoon both lines parallel & close together. I conclude no spont. movement

The Legume plant tip of one leaflet, I think did make little circle, but so small not safe to trust — may have been movement to light & probably was so. —

This legume plant, now between 5 & 6 inches high, has suddenly developed between terminal leaflets a fairly— long tendril!!!