ANY biologically aware parent who has started talking about the birds and the bees will have realised halfway through that what they are really discussing is flowers. Bees carry pollen grains from one ...

CHRISTIAN CONRAD SPRENGEL'S treatise on the structure and fertilisation of flowers, after well nigh a century of oblivion, has come to be recognised as one of the most interesting of books, and his ...

On the co-existence of Irco forms of flowers in the same species or genus,—a more conspicuous one adaptred to cross-ferlilisalion by insects, and a less conspicuous one adapted to self-fertilisation.