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From L. E. Becker   8 July [1863]

Summary

Sends seeds of female Lychnis diurna; has found none in hermaphrodites.

On variation, hybridity, and inheritance of parasites in this plant.

Author:  Lydia Ernestine Becker
Addressee:  Charles Robert Darwin
Date:  8 July [1863]
Classmark:  DAR 160: 110
Letter no:  DCP-LETT-4235

From L. E. Becker   31 July [1863]

Summary

Has found seeds produced by an hermaphroditic Lychnis and will send them. On structural obstacles to fertilisation of hermaphrodite Lychnis.

Author:  Lydia Ernestine Becker
Addressee:  Charles Robert Darwin
Date:  31 July [1863]
Classmark:  DAR 160: 111
Letter no:  DCP-LETT-4258
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