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Darwin Correspondence Project

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Darwin Correspondence Project
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From Asa Gray   [early August 1856]

Summary

Believes intermediate varieties are generally less numerous in individuals than the two states that they connect.

Discusses the difficulties of deciding what is the typical form of a species

and gives some opinions on the variability of introduced species compared with indigenous species.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  [early Aug 1856]
Classmark:  DAR 165: 93
Letter no:  DCP-LETT-1934

Matches: 1 hit

From Asa Gray   4 November 1856

Summary

Outlines the ranges of northern U. S. species common to Europe. Hopes to investigate the resemblances between the floras of the north-eastern U. S. and western Europe. Discusses routes by which alpine plants appear to have reached U. S.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  4 Nov 1856
Classmark:  DAR 165: 95
Letter no:  DCP-LETT-1982

Matches: 2 hits

  • … Gray, Asa Darwin, C. R. …
  • Darwin’s Natural selection: being the second part of his big species book written from 1856 to 1858. Edited by R. C. …

From Asa Gray   23 September 1856

Summary

Plants that are social in the U. S. but are not so in the Old World.

Distribution of U. S. species common to Europe.

Gives Theodor Engelmann’s opinion on the relative variability of indigenous and introduced plants and notes the effects of man’s settlement on the numbers and distribution of indigenous plants.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  23 Sept 1856
Classmark:  DAR 165: 94
Letter no:  DCP-LETT-1959

Matches: 2 hits

  • … Gray, Asa Darwin, C. R. …
  • Darwin’s Natural selection: being the second part of his big species book written from 1856 to 1858. Edited by R. C. …
Document type
letter (3)
Author
Gray, Asa[X]
Addressee
Correspondent
Date
1856
08 (1)
09 (1)
11 (1)