Summary

Sends Primula MS, which CD has promised to communicate to Linnean Society [see 4213].

Will soon send results on peloric Antirrhinum.

Summary

Discusses heterostyly in Hottonia.

Criticises L. C. Treviranus’ statements on Primula longiflora’s having short-styled form.

Describes his results with crossing different coloured primroses. Will let CD, when he reads his paper, decide whether his finding white and red varieties perfectly sterile when crossed, yet fertile inter se, ought to be published.

Difficulty in getting his orchid paper published in Edinburgh New Philosophical Journal.

Summary

JS criticises natural selection as based on an innate "continuously watchful selective principle".

Seeks seed of wild Rocky Mountain maize.

What is CD’s view on origin of maize?

Seeks information on self-sterility of Passiflora and Lobelia.

Weeping habit of trees.

Intended to say bisexual plants presented more established varieties than unisexual, not that they are more variable.

Explains his opinion that homomorphically fertilised Primula will produce only their own form. Is trying homomorphic crosses with different coloured Primula varieties.

Asks to read Asa Gray’s 2d review of Orchids.

Has finally successfully fertilised Gongora, but it was done by unnatural means.

Summary

Orchid paper in press.

Asks CD to correct MS of his Primula paper [J. Linn. Soc. Lond. (Bot.) 8 (1865): 78–126].

Summary

Encourages JS to publish on sterility of orchids and to experiment on Passiflora.

Doubted Hooker’s poppy case.

Describes case of primrose with three pistils: when pulled apart allowed pollen to be placed directly on ovules. This supports JS’s explanation of H. Crüger’s case.

Summary

Thanks CD for influence used with Hooker to obtain a colonial position. Has offended J. H. Balfour by refusing the Darjeeling post and James McNab has become unfriendly, although his experiments do not detract from his garden work.

Will write Primula paper for Linnean Society as CD suggests.

His Darwinism is unpalatable at Edinburgh Botanic Garden.

Describes results with non-dimorphic Primula species. Such cases do not accord with CD’s view that characters are slowly acquired.

Thanks for criticism of his writing style.

Summary

Encourages JS to continue work on coloured primrose. No one has noticed this since Gärtner. CD will send his own data for JS’s use and will read MS when ready. Advises JS to repeat experiments if evidence is weak – for his reputation’s sake and for satisfaction at fully establishing a fact.

Treviranus made a slip of pen in writing of Primula longiflora as short-styled.

Summary

JS’s MS [of Primula paper] arrived, but CD is too ill to read it.

CD has sent JS’s paper on orchid sterility to Botanische Zeitung and to Hooker.

Summary

Thanks JS for the very large Acropera capsule. CD has perhaps made a blunder about the sex of Acropera.

JS was right that successive homomorphic generations of Primula breed true.

Summary

Has read JS’s paper [MS of "Observations on the functions and structure of the reproductive organs in the Primulaceae", J. Linn. Soc. Lond. (Bot.) 8 (1865): 78–126] which has interested him greatly. Will communicate it to the Linnean Society if JS carries out a few corrections.

Would like to hear about his Verbascum and Passiflora experiments.

Summary

Thanks JS for abstract of orchid sterility paper from Edinburgh Courant. His case of individual sterility will be of highest use to CD. Criticises JS’s writing. Points out weaknesses in the organisation of his argument and the use of inflated, imprecise language.

Summary

Glad to hear of JS’s orchid paper [Trans. Bot. Soc. Edinburgh 7 (1863): 543–50].

Suggests experiments on peloria.

Wants to count seed of the self-fertile red cowslip with equal stamens and styles.

Can send account of Hottonia.

Summary

Answers JS’s criticism of natural selection, which he doubts JS understands. CD does not believe in an "innate selective principle".

To understand "utility" JS should read CD on correlation.

Origin of maize: no longer thinks husked form was wild because of Asa Gray’s evidence on its variability.

Has information from Thomas Rivers on weeping habit in trees.

JS’s experiments on coloured primroses.

Encloses bibliographical note on Passiflora.

Summary

Impressed by JS’s attempts to fertilise Gongora.

CD has large collection of notes on orchids, but does not know when he will publish on them again.

Asks for JS’s papers on sterility of individual orchids and on Drosera.

Summary

Studying self-sterility, particularly in Oncidium, where abortion occurs consistently but stigma functions normally. His hybrid orchid crosses show sterility occurs capriciously. Thus it is not a "special endowment".

Disputes Asa Gray’s and Hermann Crüger’s view of rostellar germination.

Doubts absolute sterility of Catasetum.

Disappointed by results with homomorphic cowslips.

Summary

Tells JS Acropera capsule should be left to grow.

JS was correct on "bud-variation" in fern frond.

Does not believe Primula structure necessarily related to dioecism, but the difference in fertility of the two forms forced him to admit the possibility.

Summary

Has finished correcting Primula paper [see 4332].

Has presented paper on monoecious spikes of maize [Edinburgh New Philos. J. 2d ser. 19 (1864): 213–20].

Summary

Thanks for CD’s answers on Passiflora

and Asa Gray review.

Has observed gradation of sterility in Oncidium species.

Has observed rostellar germination and fertilisation in Laelia. The latter was prevented in Bletia by covering the stigma with plaster of Paris.

Gongora atropurpurea capsules are swelling.

Summary

CD has spoken to Hooker of JS’s scientific merit, but has not suggested him for a colonial appointment.

Advice on style of writing.

Making extensive extract of JS’s orchid paper to communicate to Linnean Society [J. Linn. Soc. Lond. (Bot.) 8 (1865): 162–7].

Summary

CD’s respect for JS’s indomitable work and interesting experiments increases steadily.

His gratitude for the primulas and the astonishing Gongora specimen.

Asks JS’s opinion about crossing a primrose with the pollen of a wild cowslip and of a cultivated polyanthus.