Hooker, just returned from U. S., says Pinus nordmanniana leaves are spread horizontally in the morning and rise during the day.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Hooker, just returned from U. S., says Pinus nordmanniana leaves are spread horizontally in the morning and rise during the day.
Wants seed with large cotyledons to test for sensitivity and movement.
Movements in cotyledons; outlines tracing technique. [A tracing of movements of red cabbage cotyledon enclosed.]