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The Different Forms of Flowers on Plants of the Same Species by Charles Darwin
page 48 of 371 (12%)
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.
Primula Sinensis (after Hildebrand) : 100 : 42.

Primula auricula (Scott) : 80 : 15.

Primula Sikkimensis (Scott): 95 : 31.

Primula cortusoides (Scott): 74 : 66.

Primula involucrata (Scott): 72 : 48.

Primula farinosa (Scott): 71 : 44.

Average of the nine species : 88.4 : 61.8.

The fertility of the long-and short-styled plants of the above species of
Primula, when the two forms are fertilised legitimately, and illegitimately with
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