Lithospermum longiflorum has cleistogamous flowers and, unlike other species of genus, it is not dimorphic.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Lithospermum longiflorum has cleistogamous flowers and, unlike other species of genus, it is not dimorphic.
Has two young friends who wish to call on CD.
Has received CD’s book [Forms of flowers]; thanks him for the compliment of the dedication.
Will try to get Ipomoea and Megarrhiza seeds for CD.
Sends some cotton seeds for CD.
Germination of Megarrhiza. AG’s observations at variance with CD’s.
Sends seeds of Megarrhiza and gives details of species.
Germination and root of Ipomoea.
Encloses a letter from Volney Rattan of California.
Confirmation of CD’s idea: AG planted seeds Ipomœa pandurata. One seed has come up and its germination is same as of I. leptophylla.
Information about Ipomœa jalapa.
Apologises for his silence when Francis Darwin’s paper was read at the Linnean Society.
AG’s review of Movement in plants [Nation 32 (1881): 17–18].
Has filled up CD’s paper [see 1674].
Distribution and relationships of alpine flora in U. S.
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.
Believes intermediate varieties are generally less numerous in individuals than the two states that they connect.
Discusses the difficulties of deciding what is the typical form of a species
and gives some opinions on the variability of introduced species compared with indigenous species.
Plants that are social in the U. S. but are not so in the Old World.
Distribution of U. S. species common to Europe.
Gives Theodor Engelmann’s opinion on the relative variability of indigenous and introduced plants and notes the effects of man’s settlement on the numbers and distribution of indigenous plants.
Outlines the ranges of northern U. S. species common to Europe. Hopes to investigate the resemblances between the floras of the north-eastern U. S. and western Europe. Discusses routes by which alpine plants appear to have reached U. S.
Discusses the ranges of alpine species in U. S. and considers the possible migration routes of such species from Europe.
Lists those U. S. genera which he considers protean and describes the U. S. character of some genera which are protean in Europe.
Describes how he distinguishes introduced and aboriginal stocks of the same species.
Comments on species with disjoined ranges; does not feel, despite CD’s expectations, that they tend to belong to small families.
Gives the proportion of U. S. trees in which the sexes are separate [see Natural selection, p. 62].
Discusses difficulties involved in deciding which genera are protean in the light of some comments by H. C. Watson.