Thanks for leaves. His notes on them will be of greatest service. He cannot distinguish some Eucalypti from Acacia. Sends specimens, with numbers, for Hooker to name. Acacia farnesiana branches arrived withered, but saw enough to make him wish to examine the plant. Has thought of some troublesome experiments for Drosophyllum. Encloses remarks [missing] by Searles Wood, with which Darwin disagrees, about a new and strongly marked variety transmitting its characters. The competition of better adapted forms seems to Darwin a sufficient explanation [for extinction].
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