The Different Forms of Flowers on Plants of the Same Species

by Charles Darwin

Primula Sinensis (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 of Primula : 88.4 : 69.

Hottonia palustris (H. Muller) : - : 61.

Linum grandiflorum (the difference probably is much greater) : - : 69.

Linum perenne : - : 20.