10, which shows the flowers, six times magnified, in their natural position,
with their petals and calyx on the near side removed.
LONG-STYLED FORM.
This form can be at once recognised by the length of the pistil, which is
(including the ovarium) fully one-third longer than that of the mid-styled, and
more than thrice as long as that of the short-styled form. It is so
disproportionately long, that it projects in the bud through the folded petals.
It stands out considerably beyond the mid-length stamens; its terminal portion
depends a little, but the stigma itself is slightly upturned. The globular
stigma is considerably larger than that of the other two forms, with the
papillae on its surface generally longer. The six mid-length stamens project
about two-thirds the length of the pistil, and correspond in length with the
pistil of the mid-styled form. Such correspondence in this and the two following
forms is generally very close; the difference, where there is any, being usually
in a slight excess of length in the stamens. The six shortest stamens lie
concealed within the calyx; their ends are turned up, and they are graduated in
length, so as to form a double row. The anthers of these stamens are smaller
than those of the mid-length ones. The pollen is of the same yellow colour in
both sets. H. Muller measured the pollen-grain in all three forms, and his
measurements are evidently more trustworthy than those which I formerly made, so
I will give them.
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