The six shortest stamens are
enclosed within the calyx, and resemble in all respects the shortest stamens of
the long-styled form; both these sets correspond in length with the short pistil
of the short-styled form. The green pollen-grains of the longest stamens are 9
to 10 in diameter, whilst the yellow grains from the shortest stamens are only
6; or as 100 to 63. But the pollen-grains from different plants appeared to me,
in this case and others, to be in some degree variable in size. The capsules
contain on an average 130 seeds; but perhaps, as we shall see, this is rather
too high an average. The seeds themselves, as before remarked, are smaller than
those of the long-styled form.
SHORT-STYLED FORM.
The pistil is here very short, not one-third of the length of that of the long-
styled form. It is enclosed within the calyx, which, differently from that in
the other two forms, does not enclose any anthers. The end of the pistil is
generally bent upwards at right angles. The six longest stamens, with their pink
filaments and green pollen, resemble the corresponding stamens of the mid-styled
form. But according to H. Muller, their pollen-grains are a little larger,
namely 9 1/2 to 10 1/2, instead of 9 to 10 in diameter. The six mid-length
stamens, with their uncoloured filaments and yellow pollen, resemble in the size
of their pollen-grains and in all other respects the corresponding stamens of
the long-styled form.
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