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.
Column 2: Illegitimate Unions, Judged of by the Proportional Number of Flowers
which produced Capsules.
Column 3: Illegitimate Unions, Judged of by the Average Number (or Weight in
some cases) of Seeds per Capsule.
Primula veris : 69 : 65.
Primula elatior : 27 : 75 (Probably too high).
Primula vulgaris : 60 : 54 (Perhaps too low).
Primula Sinensis : 84 : 63.
Primula Sinensis (second trial) : ? : 53.
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