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. The pollen-
grains of the two forms differ in size and transparency as before, but not in
shape. The fertility of the two legitimate to that of the two illegitimate
unions is by the first standard as 100 to 72; and by the second standard as 100
to 47.

Primula farinosa.

According to Mr. Scott, the pistil of the long-styled form is only about twice
as long as that of the short-styled. The stigmas of the two forms differ but
little in shape. The pollen-grains differ in the usual manner in size, but not
in form. The fertility of the two legitimate to that of the two illegitimate
unions is by the first standard as 100 to 71, and by the second standard as 100
to 44.]

SUMMARY ON THE FOREGOING HETEROSTYLED SPECIES OF PRIMULA.

TABLE 1.12. Summary on the Fertility of the two Legitimate Unions, compared with
that of the two Illegitimate Unions, in the genus Primula. The former taken at
100.

Column 1: Name of Species.