Notes several cases of "dioecio-dimorphism" in different genera; feels the discovery of pollen that will act only on the pistil of another flower is most important. Believes CD should next turn his attention to investigating cases of "precocious fertilisation".

Dimorphism and cleistogamy in Hottonia.

AG wants new, unambiguous term for what is now referred to as "dimorphism", "dioecio-dimorphism", or "heterostyly"; proposes "heterogone".

Sends an excerpt from Bulletin of Torrey Botanical Club 2 (June 1871) on Hottonia inflata.

Asked C. E. Bessey whether Lithospermum longiflorum was dimorphic like its relatives. Encloses CEB’s reply.

AG’s review of Joseph Cook ["Lectures on biology", New Englander 37: 100–13].

Encourages CD to work at heliotropism.

Thinks Thomas Meehan is as "rattle-brained" as Joseph Cook.

[A damaged fragment cut from this letter is pinned to 11051.]

Believes, with CD, that extinction may be an important factor in explaining plant distributions, but sees no reason why the several species of a genus must ever have had a common or continuous area. "Convince me of that, or show me any good grounds for it … and I think you would carry me a good way with you". It is just such people as AG that CD has to satisfy and convince.

Feels that the crossing of individuals is important in repressing variation and perhaps in perpetuating the species, but instances some plants in which it cannot, apparently, take place.

Discusses dimorphism and suggests CD investigate Valeriana.

Praises CD’s views with respect to the U. S. Civil War and relations with England. Worsening relations between Britain and U. S.

Observations on Platanthera.

Possibility of trimorphism in Mertensia.

Suggests CD try to get Lythrum hyssopifolia from France.

Dimorphic flowers.

Differences between newly opened and older orchids.

Flowers of Spiranthes and Goodyera.

Encloses maize seeds.

Has heard of a butterfly with pollinia of Platanthera stuck to it.

Comments on AG’s notes ["Dimorphism in the genitalia of flowers", Am. J. Sci. 2d ser. 34 (1862): 149–50].

"Precocious fertilisation".

Sees difficulties in adhering to the concept of design in nature.

Is surprised at Hooker’s and Daniel Oliver’s ignorance regarding spontaneous movements of tendrils.

CD should continue his work on climbing plants, "it will be fruitful in your hands".

Discusses CD’s and Mrs Gray’s health.

Comments on some climbing plants.

Praises Wallace’s article applying natural selection to man ["The origin of human races", J. Anthropol. Soc. Lond. 2 (1864): clviii–clxxxvi].

Discusses the reported sterility of the flowers of Voandzeia and Amphicarpaea.

Feels the ending of slavery is worth the cost of the Civil War.

Congratulates CD on the Copley Medal.

Is making inquiries on the habits of American cuckoos and sends a letter from Henry Bryant on that subject.

Discusses the Civil War.

Encloses letter from W. H. Leggett containing observations on Amphicarpaea.

Asks AG to forward [unspecified] enclosure to Chauncey Wright.

Is collecting facts on variation; questions AG on the alpine flora of the U. S.

Sends a list of plants from AG’s Manual of botany [1848] and asks him to append the ranges of the species.

Has received but not yet read Insectivorous plants.

AG’s notices of Insectivorous plants [Nation 22 (1876): 12–14, 30–2]

and Climbing plants [2d ed., Am. J. Sci. 3d ser. 11 (1876): 69–74].

Use of flower peduncles for support in Maurandia. Transition from branches to tendrils.

Would like sheets of Cross and self-fertilisation if it is not already out.

Thanks for sheets of new book. Intends to talk about it at a scientific social club meeting.

Is amused to read CD’s criticisms of his own style, as in the U. S. it is spoken of as being as faultless as his temper. Corrects a reference.

Discusses some dimorphic plants.

Sends specimens of Rhamnus but his few specimens of Leucosmia are very poor.

Sends specimen of Gilia aggregata and will try to get Phlox subulata.