Summary

Working on monstrous Primula. Is ovule anatropous as Asa Gray says, or amphitropous? Does he know natural path of pollen tubes in Primula. Can the tube enter the ovule by the chalaza?

Summary

Thanks for "multitudinous" references.

Thanks Hooker for orchids.

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Botanists are obliged to regard tendrils as either leaf- or stem-formations. Vitis, Passiflora, and Clematis are discussed. [See 4398.]

Summary

L. H. Palm [Über das Winden der Pflanzen (1827)] is better on climbing plants than H. von Mohl [Über den Bau und das Winden der Ranken und Schlingpflanzen (1827)].

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Discusses the cleistogamous flowers of Oxalis. Thinks they may not be truly cleistogamous but merely arrested or imperfectly developed normal flowers.

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Requests observations on Drosera and Dionaea,

and asks DO to look up Buchanan and Wight on insectivorous plants ["Conspectus of Indian Utricularia", Hooker’s J. Bot. 1 (1849): 372–4].

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CD’s observations on preference of Drosera for milk and nitrogenous fluids, and the effect of nitrate of ammonia are interesting. Asks whether CD is satisfied that the effect is not due to density of fluid or to a chemical irritant. His own observations suggest such possibilities.

Summary

Lists of nitrogenous organic fluids that produce contraction in Drosera, and details of how to reproduce results.

Summary

DO’s candidacy for Professorship of Botany [at University College, London].

Henrietta’s health is better.

Paper in Botanische Zeitung [T. Nitschke, "Über die Reizbarkeit der Blätter von Drosera rotundifolia", 18: 229–34, 237–45, 245–50] missed leading point that plants close longer over animal substances. Carbonate of ammonia works on Lemna and Euphorbia roots.

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List of references on orchid structure and fertilisation.

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Praise for DO’s paper on Hamamelidaceae ["On Sycopis", Trans. Linn. Soc. Lond. 23 (1862): 83–9, read 15 Mar 1860]. Everything points to its being a "bankrupt" family.

Hydropathy at Malvern may take him from Drosera. Requests Dionaea and Cypripedium.

Summary

CD will publish on Primula [Collected papers 2: 45–63]. Will DO ask W. H. Fitch to make woodcuts of "pin" and "non-pin" primroses [i.e., long-styled and short-styled forms]? Encloses a sketch.

Summary

Thanks W. H. Fitch for drawing for the Primula paper. Death of experimental plants delays publication.

Summary

Asks DO to identify a plant grown from earth adhering to the foot of a woodcock.

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Describes floral anatomy of a Catasetum sent by DO.

Has gone on from orchids to studying insect agency in Pelargonium.

His doubts on the worth of publishing Orchids.

Summary

Fertile flowers of violets, except Viola tricolor, require insect visits.

Summary

If CD understood Nepenthes, he would understand every class of climbers.

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Requests addresses of J. E. Planchon, W. F. Hofmeister and M. J. Schleiden so he can send them copies of Lythrum paper [Collected papers 2: 106–31].

Summary

Notes on the taxonomy of Primula.

Summary

Sends Utricularia montana and Byblis species.

Drosera census numbers 100 species.

Genlisea distinguished from Utricularia.