From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
16 July 1870
Source of text:
DAR 166: 211
Summary:
Sends CD some seeds.
Has been experimenting with Oxalis crosses.
Contributor:
Darwin Correspondence Project
From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
5 Feb 1872
Source of text:
DAR 166: 212
Summary:
Praise for Descent.
Contributor:
Darwin Correspondence Project
From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
23 May 1873
Source of text:
DAR 76: B179–80
Summary:
Sends results of his observations of cross- and self-fertilisation of Hypecoum grandiflorum and Eschscholzia californica [see Cross and self-fertilisation, pp. 331–2].
Contributor:
Darwin Correspondence Project
From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
26 July 1875
Source of text:
DAR 166: 213
Summary:
No new experiments on mutually sterile maize varieties since his paper in Botanische Zeitung in 1868.
Contributor:
Darwin Correspondence Project
From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
6 Dec 1876
Source of text:
DAR 166: 214
Summary:
Repeated maize crosses without success: i.e., in most cases yellow and red varieties did not produce fertile offspring.
Contributor:
Darwin Correspondence Project
From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
18 Jan 1877
Source of text:
DAR 166: 215
Summary:
Praise for Cross and self-fertilisation: most important point proved is benefit of crossing between related individuals grown under different conditions. This explains adaptive value of dispersal mechanisms.
Contributor:
Darwin Correspondence Project
From:
Friedrich Hermann Gustav (Friedrich) Hildebrand
To:
Charles Robert Darwin
Date:
19 Mar 1877
Source of text:
DAR 111: A84
Summary:
Regrets he cannot help on Oxalis question. He did not note the names of species with cleistogamic flowers as he thought they were sufficiently known.
Contributor:
Darwin Correspondence Project