No new experiments on mutually sterile maize varieties since his paper in Botanische Zeitung in 1868.
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No new experiments on mutually sterile maize varieties since his paper in Botanische Zeitung in 1868.
Repeated maize crosses without success: i.e., in most cases yellow and red varieties did not produce fertile offspring.
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.
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.
Sends CD some seeds.
Has been experimenting with Oxalis crosses.
Praise for Descent.
Sends results of his observations of cross- and self-fertilisation of Hypecoum grandiflorum and Eschscholzia californica [see Cross and self-fertilisation, pp. 331–2].