skip to content

Darwin Correspondence Project

Search Results

Darwin Correspondence Project
Search:
"Darwin C R" in search-correspondent disabled_by_default
1863::03::20 in date disabled_by_default
1 Item
Sorted by:  
Page: 1

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