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Search: contains "Darwin, C. R", date is "1857::02", author is "Gray, Asa"

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From Asa Gray   16 February 1857


Discusses the ranges of alpine species in U. S. and considers the possible migration routes of such species from Europe.

Lists those U. S. genera which he considers protean and describes the U. S. character of some genera which are protean in Europe.

Describes how he distinguishes introduced and aboriginal stocks of the same species.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  16 Feb 1857
Classmark:  DAR 165: 96
Letter no:  DCP-LETT-2053

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Gray, Asa[X]