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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 | (1) |
Author
| Darwin, C. R. | (1) |
Addressee
| Gray, Asa | (1) |
Correspondent
| Darwin, C. R. | (1) |
| Gray, Asa |
