Darwin-Hooker Letters : Letter from C. R. Darwin to J. D. Hooker 4 December [1854]
Darwin, Charles Robert
Darwin-Hooker Letters
<p style='text-align: justify;'>Is Bentham’s list of aberrant genera biased by exclusion of genera with many species?</p><p style='text-align: justify;'>JDH’s belief that <i>Aquilegia</i> varieties are one species is consistent with their great interfertility.</p>