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To Hugo de Vries 13 February 1879
Summary
Discusses heliotropism in plant cotyledons. Asks for information.
| Author: | Charles Robert Darwin |
| Addressee: | Hugo de Vries |
| Date: | 13 Feb 1879 |
| Classmark: | Artis Library (De Vries 5) |
| Letter no: | DCP-LETT-11881 |
To Hugo de Vries 12 August 1879
Summary
Thanks for letter.
Comments on growth and movement of plants.
| Author: | Charles Robert Darwin |
| Addressee: | Hugo de Vries |
| Date: | 12 Aug 1879 |
| Classmark: | Artis Library (De Vries 6) |
| Letter no: | DCP-LETT-12190 |
To Hugo de Vries 6 September 1879
Summary
Perhaps movement from side to side in plants is caused by the contraction of one side, rather than the expansion of the other.
Sends seeds of Lychnis Githago: he observed the hypocotyledenous stem, not the root, contracting.
| Author: | Charles Robert Darwin |
| Addressee: | Hugo de Vries |
| Date: | 6 Sept 1879 |
| Classmark: | Artis Library (De Vries 7) |
| Letter no: | DCP-LETT-12219F |
