Primula Sikkimensis.
According to Mr. Scott, the pistil of the long-styled form is fully four times
as long as that of the short-styled, but their stigmas are nearly alike in shape
and roughness. The stamens do not differ so much in relative length as the
pistils. The pollen-grains differ in a marked manner in the two forms; "those of
the long-styled plants are sharply triquetrous, smaller, and more transparent
than those of the short-styled, which are of a bluntly triangular form." The
fertility of the two legitimate unions to that of the two illegitimate unions is
by the first standard as 100 to 95, and by the second standard as 100 to 31.
Primula cortusoides.
The pistil of the long-styled form is about thrice as long as that of the short-
styled, the stigma being double as long and covered with much longer papillae.
The pollen-grains of the short-styled form are, as usual, "larger, less
transparent, and more bluntly triangular than those from the long-styled
plants." The fertility of the two legitimate unions to that of the two
illegitimate unions is by the first standard as 100 to 74, and by the second
standard as 100 to 66.
Primula involucrata.
The pistil of the long-styled form is about thrice as long as that of the short-
styled; the stigma of the former is globular and closely beset with papillae,
whilst that of the short-styled is smooth and depressed on the apex.
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