2 Items
Page: 1
To Asa Gray 26 June [1863]
Summary
Thanks AG for references about phyllotaxy
and information on marriage laws.
Has been looking for dimorphism in Phlox and Euonymus.
Has observed the irritability of tendrils of Echinocystis with great interest. Was also struck by the rotating movements of the leading shoots, which he proposes to investigate.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 26 June [1863] |
| Classmark: | Gray Herbarium of Harvard University (82) |
| Letter no: | DCP-LETT-4222 |
To Asa Gray 20 March [1863]
Summary
Discusses the meaning of C. K. Sprengel’s term "dichogamy". Dichogamous plants are functionally monoecious; Primula is functionally dioecious.
Reports Hermann Crüger’s observations of Cattleya and of bees pollinating Catasetum. Crüger will observe Melastomataceae.
Has built a hothouse.
Fears Amsinckia cannot be dimorphic.
Ill health slows his work on Variation.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 20 Mar [1863] |
| Classmark: | Gray Herbarium of Harvard University (58) |
| Letter no: | DCP-LETT-4053 |
Document type
| letter | (2) |
Author
| Darwin, C. R. | (2) |
Addressee
| Gray, Asa | (2) |
Correspondent
| Darwin, C. R. | (2) |
| Gray, Asa |
