..Page 263-279
CHAPTER VI.
MODIFIED CIRCUMNUTATION: SLEEP OR NYCTITROPIC MOVEMENTS, THEIR USE: SLEEP
OF COTYLEDONS.
Preliminary sketch of the sleep or nyctitropic movements of leaves--
Presence of pulvini--The lessening of radiation the final cause of
nyctitropic movements--Manner of trying experiments on leaves of Oxalis,
Arachis, Cassia, Melilotus, Lotus and Marsilea and on the cotyledons of
Mimosa--Concluding remarks on radiation from leaves--Small differences in
the conditions make a great difference in the result - Description of the
nyctitropic position and movements of the cotyledons of various plants--
List of species--Concluding remarks--Independence of the nyctitropic
movements of the leaves and cotyledons of the same species--Reasons for
believing that the movements have been acquired for a special
purpose...280-316
CHAPTER VII.
MODIFIED CIRCUMNUTATION: NYCTITROPIC OR SLEEP MOVEMENTS OF LEAVES.
Conditions necessary for these movements--List of Genera and Families,
which include sleeping plants--Description of the movements in the several
Genera--Oxalis: leaflets folded at
[page viii.
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