With respect to the equal-styled plants in the table, Mr. Horwood raised from
purchased seeds four plants, which he remembered were certainly not long-styled,
but either short or equal-styled, probably the latter. These four plants were
kept separate and allowed to fertilise themselves; from their seed the seventeen
plants in the table were raised, all of which proved equal-styled. The stamens
stood low down in the corolla as in the long-styled form; and the stigmas, which
were globular and smooth, were either completely surrounded by the anthers, or
stood close above them. My son William made drawings for me, by the aid of the
camera, of the pollen of one of the above equal-styled plants; and, in
accordance with the position of the stamens, the grains resembled in their small
size those of the long-styled form. He also examined pollen from two equal-
styled plants at Southampton; and in both of them the grains differed extremely
in size in the same anthers, a large number being small and shrivelled, whilst
many were fully as large as those of the short-styled form and rather more
globular. It is probable that the large size of these grains was due, not to
their having assumed the character of the short-styled form, but to monstrosity;
for Max Wichura has observed pollen-grains of monstrous size in certain hybrids.
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