States he has "misgivings about the definiteness of species". Believes there is some inherent tendency for plants to originate varieties. Cross-fertilisation is likely in most cases but sees difficulties with plants like Adlumia.
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States he has "misgivings about the definiteness of species". Believes there is some inherent tendency for plants to originate varieties. Cross-fertilisation is likely in most cases but sees difficulties with plants like Adlumia.
Important issue at stake with new flora calculations: evidence that species are only strongly marked varieties. Planning large-scale survey.
Is looking forward to returning home [from Moor Park hydropathic establishment]. News of other patients and the books she is reading. Although feeling well, cannot walk much.
Delighted that JSH is coming to Down. Sends correct train time.
Asks JL not to call as he has a "very old friend" [J. S. Henslow] coming to visit him.
Yesterday visited poultry show at Crystal Palace.
Invites JL to dine and meet J. S. Henslow.
Tabulation of varieties goes on; very important as it shows the branching of forms. Mentions his principle of divergence.