[71]

Sleep — Movement

Phaseolus caracalla— the cots. Hypogean— the 1st unifoliate leaf of the ordinary shape hangs vertically down at night.

Ph. Roxburghii Cots above ground, the 1' leaf is unifoliate & lancet-shaped. —

On May 1' in evening at 4°. 45' P.m stood 21 1/2° above Horizon.— At 10° P.m each had stood at 46° above horizon, so had risen 25° 1/2 degrees.— This rising which is so [remarkable] in genus may be due to these leaves never standing horizontally & to these petioles being very short.—

On May 12th the 2 leaves on another 2 or 3 other plant stood at 10° 10' P.m 62° above Horizon, & by next morning at 7° a.m had fallen to 20° above horizon, so nocturnal rise 42°. If leaflet on the trifoliate leaves sink at night can well worth giving & allude under "embryology of Leaves"

Ph. Hernandesii: the great first unifoliates & leaflets of second trifoliate leaves sink down at night — mostly vertically.

[71v]

Proof 213 [Cross and self fertilisation, pp. 425-6]

[72]

Diurnal sleep— give

Phaseolus Roxburgii. Cots not hypogæn, the lancet — shade— first unifoliate leaves stood at 7° a.m.

May 13th at 20° above horizon & almost certainly fell afterwards lower. The sun shone out very brightly & at 12° they had risen to 56° above horizon; the pot was placed in so as to be protected from the sun though brightly illuminated from above, & now in only 1/2 hour each fell 40° to 16° above horizon!

At same time the larger & broad first unifoliate & the secondary trifoliate leaves of Ph. Hernandesii was observed: several of them former had bowed upwards & stood quite erect with their edge to the sun & several of the others had twisted round so that their lateral edge were presented to the sun. — So these 2 very different movements on the same plant—

 The plants were removed from the sun & after 1 1/2 hours were looked at again & all the leaves had reassumed their horizontal or sub-horizontal positions.

14th On same leaf the 3 leaflet twist differently so as to bring edge to sun

Para-heliotropism for matching

[72v]

Proof 197

[Cross and self fertilisation, p. 393]