Darwin-Hooker Letters : Letter from J. D. Hooker to C. R. Darwin 14 November 1844
Hooker, Joseph Dalton
Darwin-Hooker Letters
<p style='text-align: justify;'>Differences in variability of species within a single genus. Further observations on <i>Lycopodium</i>.</p><p style='text-align: justify;'>Interested in Humboldt’s river with different floras on opposite banks, and other unexplained cases of very local distributions.</p>