Eschscholtzia californica—productiveness of the same plants, as judged by the number of capsules produced, and the average number of seeds per capsule: 89.

Eschscholtzia californica—plants left uncovered and cross-fertilised by bees; capsules on plants derived from intercrossed plants of the 2nd generation of the Brazilian stock crossed by English stock, compared with capsules on self-fertilised plants of 2nd generation, contained seeds, in number: 63.

Eschscholtzia californica—productiveness of the same plants, as judged by the number of capsules produced, and the average number of seeds per capsule: 40.

Reseda odorata—crossed and self-fertilised plants, left uncovered and cross-fertilised by bees; produced capsules in number (about): 100.

Viola tricolor—crossed and self-fertilised plants, left uncovered and cross-fertilised by bees, produced capsules in number: 10.

Delphinium consolida—crossed and self-fertilised plants, left uncovered in the greenhouse, produced capsules in number: 56.

Viscaria oculata—crossed and self-fertilised plants, left uncovered in the greenhouse, produced capsules in number: 77.

Dianthus caryophyllus—plants spontaneously self-fertilised under a net; capsules on intercrossed and self-fertilised plants of the 3rd generation contained seeds in number: 125.

Dianthus caryophyllus—plants left uncovered and cross-fertilised by insects: offspring from plants self-fertilised for three generations and then crossed by an intercrossed plant of the same stock, compared with plants of the 4th self-fertilised generation, produced seeds by weight: 73.

Dianthus caryophyllus—plants left uncovered and cross-fertilised by insects: offspring from plants self-fertilised for three generations and then crossed by a fresh stock, compared with plants of the 4th self-fertilised generation, produced seeds by weight: 33.