Summary

Geographical distribution. "Close" species. Hopes AG will write an essay on species.

Summary

Has filled up CD’s paper [see 1674].

Distribution and relationships of alpine flora in U. S.

Summary

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.

Summary

Suggests AG append ranges to the species in the new edition of his Manual.

Is interested in comparing the flora of U. S. with that of Britain and wishes to know the proportions to the whole of the great leading families and the numbers of species within genera. Would welcome information on which species AG considers to be "close" in the U. S.

Summary

Sends a list of "close" species from his Manual of botany.

Hopes Hooker or CD will write an essay on species. Discusses some of the difficulties of defining botanical species.

Summary

"Close" species in large and small genera.

Alphonse de Candolle on geographical distribution [Géographie botanique raisonnée (1855)].

Species variability.

Summary

When JDH goes to Germany, will he ask seed men if their marvellous true breeding lines are the result of selection.

Summary

Has left a book from Henslow for JDH at Athenaeum.

When Asa Gray wrote, did he send marked sheets [of his Manual of botany]?

Has just made out "new & wonderful" specific character between two of his pigeon breeds.

Summary

Pea self-fertilisation: has forty-five varieties growing side by side.

Describes seed-salting experiments: e.g., immersion in tank filled with snow. Reports some successful germinations.

Made list of naturalised plants from Asa Gray’s Manual [of Botany] to calculate the proportions of the great families.

Summary

Parcels sent to Down by coach may get lost.

Summary

Detailed response to JDH’s critique of sea transport and continental connection theories. JDH’s claim that low plants are widely distributed fits both theories.

Species theory does not touch origin of life.

Summary

Asks whether JSH considers Lychnis diurna and L. vespertina species or varieties.

Asks for help with his work on hybrids.

Would like JSH to go over London catalogue of British plants, marking "close species", i.e., those he considers real species but which are very closely allied. Withholds his motive as it might influence the result.

Has found Agrostis with worms in every germen and no stamens on stigma.

Now has 46 kinds of peas all growing together.

Summary

On geographical distribution of plants. Plant systematics and natural classification.

Summary

Latitude overrules everything in distribution. Alpine distributions are like insular. Tabulating proportions.

T. V. Wollaston’s Madeira insects: many flightless, thus not blown to sea. TVW’s insects do not confirm Forbes’s Atlantis.

Summary

On the transport of fish eggs by the water-beetle Dytiscus marginalis.

Summary

Rejects JDH’s suggestion that seed-salting experiments be conducted on huge scale. Only wishes to demonstrate possibility of sea transport, not establishment of any particular insular flora. More seed results.

Summary

Seeds: worried they will turn into another barnacle job.

Studies plants colonising abandoned field.

Experiment on plant sleep movements.

CD objects to "Atlantis" because no evidence; does not affect species theory.

Summary

Is having difficulties marking close species on the list of British plants.

In all his attempts to advance geographical botany he is stopped by the "application and signification of the word ""species"" " the use of which is both "indefinite and variable". He encloses his list of "Categories of Species".