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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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B A [Figures and data not transcribed]

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 9° 25' A.m. to 12° 15' & then from light till 8° 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 7° 30', to 8° 25' then to N.W. then to N.E until 11° 34'; then from light till about 1° & 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 7° 30 to 8° 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 9° 47' a.m. & the ninth dot at. 4° 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!!!