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April 12th 1879. — The cotyledons of some plants, as they grow older, for instance of some sp. of Oxalis— (O. corniculata (& Valdiviana?)) as they grow older bend permanently to the ground (& I think of Gossypium herbaceum) & this no doubt is due to Epinasty. Therefore it may well be that Epinasty is always struggling to bend them downwards in opposition to Heliotropism, but that this is conquered by modified circumnutation, so as to keep them horizontal during middle of day.— All The admission of that view, will depend on the admission of circumnutation being modified in innumerable cases for my purpose.—

(over

(Portfolio on rising of leaves in evening.)

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There may be in some cases hyponasty, & then circumnutation wd resist this during day & in evening Cots wd or leaves wd upturn, as they do.—