ABSTRACT
Hildebrand cultivated his plants in pots and kept them for a time in the house, whilst mine were grown out of doors; and he thinks that this difference of treatment may have caused the difference in our results. But this does not appear to him nearly a sufficient cause, although his plants were slightly less productive than the wild ones growing on the Siebengebirge. His plants exhibited no tendency to become equal-styled, so as to lose their proper long-styled character, as not rarely happens under cultivation with several heterostyled species of Primula; but it would appear that they had been greatly affected in function, either by long-continued cultivation or by some other cause. Hildebrand collected on the Siebengebirge, ten wild long-styled and ten short-styled plants. The former bore 289 flowers, of which 186 had set fruit, yielding 1.88 seed per fruit. The ten short-styled plants bore 373 flowers, of which 262 had set fruit, yielding 1.86 seed per fruit.
