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In the following Table some measurements of the cells in fairly
well-developed pulvini of O. corniculata are given:--
Seedling 1 day old, with cotyledon 2.3 mm. in length.
Divisions of Micrometer.**
Average length of cells of
pulvinus..................................................6 to 7
Length of longest cell below the
pulvinus..................................... 13
Length of longest cell above the
pulvinus...................................... 20
Seedling 5 days old, cotyledon 3.1 mm. in length, with the pulvinus quite
distinct.
Average length of cells of
pulvinus.................................................. 6
Length of longest cell below the
pulvinus..................................... 22
Length of longest cell above the
pulvinus...................................... 40
Seedling 8 days old, cotyledon 5 mm. in length, with a true leaf formed but
not yet expanded.
Average length of cells of
pulvinus.................................................. 9
Length of longest cell below the
pulvinus.......................


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