Thanks for Thomas Belt’s Naturalist in Nicaragua [1874], which confirms some of his observations,

and for Insectivorous plants, which he praises.

Suggests that a book integrating knowledge of plant–animal interactions be written by a Darwinist.

Defines biology as the science of external interactions.

German reception is far more positive than Italian.

Has become Professor of Botany at Genoa.

Offers to send his paper on the necessity of out-crossing.

Has reviewed Forms of flowers in Revista Botanica [(1877): 84–106].

CD’s treatment by the French Academy.

Hypothesises that the mollusc-like mantle of Balanus originates from a form of grafting.

Thanks for Movement in plants; particularly supports indirect rather than direct action of light and gravity on plants.

Support CD’s views on variability of species, but believes they must be interpreted "spiritualisticamente".

Cross-fertilisation in the Asclepiadaceae.

Declares himself CD’s defender; but he is a "teleologist".

Sends CD three more papers.

His research confirms his faith and belief in variability of species.

Acknowledges receipt of CD’s Primula paper [J. Linn. Soc. Lond. (Bot.) 10 (1869): 437–54].

Nectar-sucking birds fertilise tropical flowers.

Writing a "Dualistic apologia for Pangenesis" [see translation in Sci. Opin. 2 (1869): 365–7, 391–3, 407–8].

Homology of the orchid rostellum.

Comments on Hermann Crüger’s paper, sent by CD, on fertilisation of orchids [J. Linn. Soc. Lond. (Bot.) 8 (1865): 127–35].

Observations on dichogamy in grasses (wheat, rye, barley).

Has not yet read CD’s reply to his article on Pangenesis [Collected papers 2: 158–60].

Sends CD "L’applicazione della teoria Darwiniana ai fiori ed agli insetti visitatori dei fiori" [Bull. Soc. Entomol. Ital. 2 (1870)]. Continues to support vitalism and teleology.

Transformism explains rudimentary organs, and teratology, which are otherwise inexplicable.

Looking forward to publication of Descent

and CD’s expected book on "Variation in nature" [see Variation 1: 4].

Responds to CD’s request for Canna seeds.

Studying dichogamy in Lotus. Describes mechanism that pumps pollen on to a visiting bee. Corrects Axell on Lotus.

Sends his new work, Ulteriori osservazioni sulla dicogomia pt 2, fasc. 1.

Has found no nectar in Orchis morio or O. maculata in Italy and has seen no insects visiting the plants.

Gives his observations on cross- and self-fertilisation in cereals.

Sends paper on Artemesia.

Praise for Descent.

Has talked to St George Mivart about CD’s health.

Praise of CD. Acknowledges his indebtedness to CD for defining the subject of plant fecundation.

Expecting CD’s work on the effects of cross-fertilisation.

CD has put him in touch with George Bentham.

Going on circumnavigation voyage aboard the Garibaldi.

Left the Garibaldi at Rio de Janeiro.

Phylogeny of aphids.

Sends information on Lathyrus odoratus, Phaseolus multiflorus and Pisum sativum.

Sends last part of his book [Ulteriori observazioni sulla dicogamia (1868–74)] [osservazioni!?] and describes contents.

Looking forward to publication of Insectivorous plants, which he will review.

Paul Mantegazza has criticised FD on insectivorous plants

and CD on sexual selection; FD maintains dichogamy in plants supports sexual selection.

Thanks FD for the volumes of Revista Botanica [1874–5].