From:
Charles Robert Darwin
To:
Asa Gray
Date:
20 Mar [1863]
Source of text:
Gray Herbarium of Harvard University (58)
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.
Contributor:
Darwin Correspondence Project