Darwin-Hooker Letters : Letter from J. D. Hooker to C. R. Darwin [11 April 1857]
Hooker, Joseph Dalton
Darwin-Hooker Letters
<p style='text-align: justify;'>JDH cites W. H. Harvey’s observations on <i>Fucus</i> and David Don’s on <i>Juncus</i> as examples of variations that are independent of climate. There are many such cases. Gives his working scheme for categorising variation.</p>