Data on good and bad pollen-grain yields of different species. Sends sketches of two male Rhamnus catharticus flowers [see Forms of flowers, p. 294].
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Data on good and bad pollen-grain yields of different species. Sends sketches of two male Rhamnus catharticus flowers [see Forms of flowers, p. 294].
Thanks for copy of Cross and self-fertilisation.
Francis Darwin’s observation of nectaries in Pteris is most curious.
Doubts cross-fertilisation in the rare cases of two flowers on the same stalk in Victoria and Euryale.
Requests copy of paper read at Amsterdam Horticultural Congress, on graft-hybrids like that of Cytisus adami [see 5018].
Sends papers on graft-hybrids ["Sur les hybrides obtenus par la greffe", Bull. Congr. Int. Bot. & Hortic. Amsterdam (1865): 65–80, and "Über Mischlinge, durch Pfropfen entstanden", Sitzungsber. K. Phys.-oekon. Ges. Königsberg 6 (1865): 11–21].
Thanks RC for photograph and for papers, which are of highest interest to CD. He is not fully convinced about the rose by RC’s graft-hybrid paper [Bull. Congr. Int. Bot. & Hortic. Amsterdam (1865): 65–80]. Still retains faith in his own view that no plant is perpetually self-fertilised.
Coming to London for Botanical Congress. Requests interview.
Thanks for photograph.
Thanks CD for invitation. Solicitous of CD’s health. Will let Hooker decide whether CD’s health will allow his visit.
[Alexander] Braun in poor health.
Plans to come to Down on 27 May.
Discusses the flowers of, and cross- and self-fertilisation in, certain aquatic plants. Gives cases of dichogamy and perfect self-fertility.
Will send English edition [of Variation] when available.
Mentions revisions in second issue concerning graft-hybrids.
Asks for Euryale seed for experiment.
Discusses fertility of crossed and self-fertilised plants.
Finds important differences between English and German versions of Variation on graft-hybrids.
Experiments and observations on submerged flowers.