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Müller, Hermann in correspondent 
1870-1879::1876::09 in date 
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From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
4 Sept 1876
Source of text:
DAR 171: 306
Summary:

Bombus mastrucatus, an alpine bee, conforms to his observations that B. terrestris breaks open the flowers of Trifolium pratense. However, in the Alps, B. terrestris does not behave this way.

Gentiana species are adapted to lepidopteran cross-fertilisation.

Contributor:
Darwin Correspondence Project