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].
Asks about FH’s research on maize. Suggests experiments.
Apologises that he cannot supply any maize seed.
Thanks for FHGH’s new book; also for the list of seeds, but he does not want any at present.
Requests seeds of Nolana prostrata & Hibiscus Africanus, which have been matured in Germany or in the more Southern parts of Europe.
Mentions experiments on Lythrum.
Thanks for list of seeds.
Comments on FH’s paper ["Verbreitungsmittel der Compositenfrüchte", Bot. Ztg. 30 (1872): 1–14].
Discusses function of mucus filaments on seeds of Compositae and other plants.
Comments on Eugen Askenasy’s publication [Beiträge zur Kritik der Darwin’schen Lehre (1872)].
Comments on evolutionary views of Carl Nägeli.
Asks for results of FH’s experiments fertilizing some flowers with pollen from the same flower, & other flowers with pollen from distinct flowers borne by the same plant.
Has read FH’s paper on the distribution of the seeds of the Graminæ (Hildebrand 1872, pp. 740–1) with great interest.
Thanks for FH’s work on the means of the distribution of plants (Hildebrand 1873).