As stated in our review of the first volume (vol Ixxiv., 1906, p. 605), Knuth's “Handbook of Flower Pollination” is an encyclopaedic work, and the second volume, which is now before us, dealing as it ...

This is a preview. Log in through your library . Abstract Embryo sac development has been investigated in unpollinated, cross pollinated and gibberellic acid (GA₃ ) treated flowers of Pyrus communis L ...

We’re currently dealing with winter conditions, but to warm us up, I thought I’d cover something we observe, but may not fully understand, in spring, summer, and fall: why do bees visit flowers? Much ...