Explains dichogamy in Aristolochia. C. K. Sprengel was wrong.

Intends to begin a journal reviewing the botanical literature.

Sends his book [Die Geschlechter-Vertheilung bei den Pflanzen (1867)].

Thanks for two copies of Hildebrand’s monograph on plant sexuality (Hildebrand 1867a).

Reports making graft-hybrid potatoes.

Has found direct action of pollen in Mays [Zea] crosses and apple-trees.

F. Delpino has asked for CD’s address.

Congratulates FH on graft-hybrid of potato. Importance of FH’s discovery to be discussed in Variation [2d ed., 1: 420].

Sends graft-hybrid notice.

Thanks CD for mentioning his Corydalis and Primula experiments in Variation.

Has become Professor of Botany at Freiburg.

Encloses specimen of Corydalis cava.

Potato graft-hybrid fails to give potatoes.

August Weismann requests Wallace’s address to find out about experiments on butterflies hinted at in Variation.

Suggests FH’s graft-hybrid potatoes should remain with FH.

Sends addresses of Alfred Russel Wallace and Alexander Wallace for August Weismann.

Thanks for Botanische Zeitung notice of CD’s paper ["On the character and hybrid-like nature of the offspring from the illegitimate unions of dimorphic and trimorphic plants", J. Linn. Soc. Lond. (Bot.) 10 (1869): 393–437]. FH writes clearest style of all German authors.

Asks that August Weismann be told about papers by Wallace and Bates.

Requests seeds of Nolana prostrata & Hibiscus Africanus, which have been matured in Germany or in the more Southern parts of Europe.

Sends CD some seeds.

Has been experimenting with Oxalis crosses.

Mentions experiments on Lythrum.

Thanks for list of seeds.

Praise for Descent.

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.

Sends results of his observations of cross- and self-fertilisation of Hypecoum grandiflorum and Eschscholzia californica [see Cross and self-fertilisation, pp. 331–2].

Thanks for FH’s work on the means of the distribution of plants (Hildebrand 1873).

ED writes on behalf of her husband, who is ill, to thank FH for his letter

and to thank [L. C.] Treviranus for his paper on orchids.

CD wishes to know whether Orchis pyramidalis grows in FH’s neighbourhood. He needs a fresh specimen to compare the stigma with those grown locally.