Dictamnus fraxinella.

Digitalis purpurea. measurements. effects of intercrossing. superiority of crossed. self-sterile.

Dipsaceae.

Dobbs, bees frequenting flowers of same species.

Dodel, Dr. A., sexual reproduction.

Duhamel on Raphanus sativus.

Dunal, nectar as an excretion.

Dyer, Mr., on Lobelia ramosa.
on Cineraria.

Earley, W., self-fertilisation of Lathyrus odoratus.

Eaton, Reverend A.E., on Pringlea.

Engelmann, development of sexual forms.

Engler, Dr., on dichogamous Saxifraga.

Entomophilous plants.

Epipactis latifolia, attractive only to wasps.

Erica tetralix.
perforated corolla.

Erythrina.

Eschscholtzia californica. measurements. plants raised from Brazilian seed. weight. seeds. experiments on. superiority of self-fertilised over crossed. early flowering. artificially self-fertilised. pollen from other flowers more effective. self-sterile in Brazil.

Euphrasia officinalis.

Euryale amazonica.
—­ ferox.

Fabricius on Aristolochia.

Fagopyrum esculentum.
early flowering of crossed plant.

Faivre, Professor, self-fertilisation of Cannaceae.

Farrer, T.H., papilionaceous flowers. 
Lupinus luteus. 
Phaseolus multiflorus. 
Pisum sativum.
cross-fertilisation of Lobelia ramosa.
on Coronilla.

Fermond, M., Phaseolus multiflorus. 
Phaseolus coccineus hybridus.

Fertilisation, means of. plants sterile, or partially so without insect-aid. plants fertile without insect-aid. means of cross-fertilisation. humming-birds.  Australian flowers fertilised by honey-sucking birds. in New Zealand by the Anthornis melanura. attraction of bright colours. of odours. flowers adapted to certain kinds of insects. large amount of pollen-grains. transport of pollen by insects. structure and conspicuousness of flowers. pollen from a distinct plant. prepotent pollen.

Fertility, heights and weights, relative, of plants crossed by a fresh stock, self-fertilised, or intercrossed (Table 7/C).

Fertility of plants as influenced by cross and self-fertilisation (Table 9/D). relative, of crossed and self-fertilised parents (Table 9/E). innate, from a cross with fresh stock (Table 9/F). relative, of flowers crossed with pollen from a distinct plant and their own pollen (Table 9/G). of crossed and self-fertilised flowers.

Flowering, period of, superiority of crossed over self-fertilised.

Flowers, white, larger proportion smelling sweetly. structure and conspicuousness of. conspicuous and inconspicuous. papilionaceous. fertilised with pollen from a distinct plant.

Forsythia viridissima.

Foxglove. 
Frankland, Dr., chemical affinity.

Fraxinus ornus.

Fumaria capreolata.
—­ officinalis.