Abstract
ADMITTING, with Prof. Romanes (NATURE, February 20, p. 369), the plausibility of Mr. Cockerell's view that galls may be attributed to natural selection acting on the plants directly, I beg leave to point out a very obvious difficulty—viz. the much greater facility afforded to the indirect action through insects, by the enormously more rapid succession of generations with the latter than with many of their vegetable hosts—oaks, above all.
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WETTERHAN, D. Galls. Nature 41, 394 (1890). https://doi.org/10.1038/041394b0
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DOI: https://doi.org/10.1038/041394b0
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