Summary

Thinks he has worked out simple mechanism of movement in Drosera. Believes he is correct that gum has no effect.

Thanks for Trécul paper ["Organisation des glandes pédicellées de la feuille du Drosera rotundifolia", C. R. Hebd. Acad. Sci. 40: 1355–8; Ann. Sci. Nat. (Bot.) 3d ser. 3: 303–11].

Chloroform paralyses plants in 30 seconds.

Summary

Informs CD of possible dimorphism of Epilobium angustifolium.

Summary

Glad that Oliver is to review John Scott’s paper in the Natural History Review (Scott 1864a). Apologises that his enclosed references (now missing) are so paltry.

Summary

Observation on morphology of Primula ovarium sent for DO’s use.

Summary

Has put Drosera off while amusing himself with Primula and orchids.

Dionaea is prettily adapted to weight detection.

Summary

The number of "aquatic" flowers is reduced if one considers only those that expand under water.

Lecturing at Norwich.

Summary

Congratulations on Professorship.

Homologies between Drosera and Dionaea. Carbonate of ammonia on roots. Wants W. H. Fitch to make drawings of Dionaea. Will copy minute structure of hairs from Trécul [see 2965].

Summary

Thanks for information and extracts.

M. A. Curtis, quoted in ["Dionaea"] Penny encyclopedia [(1837) 8: 508], gives the only full account of Dionaea.

Concurs in DO’s explanation of Dionaea footstalk cells, which CD took for stomata.

Is using carbonate of ammonia as a substitute for flies and colour change in glands as index of action on Drosera. Suspects other nitrogenous compounds do not act till decomposed into carbonate of ammonia. Beginning to write Drosera paper. Action of nitrogenous compounds.

Summary

Discusses primrose ovules,

Atlantis paper [Nat. Hist. Rev. (1862): 149–70],

plant migrations;

Corydalis.

Summary

Having trouble understanding laws of phyllotaxy in order to grasp Hugh Falconer’s objections.

L. C. Treviranus on Primula [see 3980] misses the "prettiness" of the adaptations.

John Scott says P. scotica is never dimorphic.

Summary

Hildebrand’s paper is unsuitable for the Natural History Review.

Summary

Struck with corresponding positions of tendrils and flower-stalks in Passiflora. Sends [W. E. Darwin’s] dissection drawings of earliest stages. Infers that tendril is a modified flower peduncle.

Requests DO look at mode of climbing in Tecoma.

Summary

Discusses homologies of plant organs.

The passion-flower tendril should be considered a modified branch rather than a modified flower. Considers the distinction between the peduncle and the leaf midrib.

Summary

Admires DO’s correlation of spiny tree species and dry hot climate. CD suggests that spines, like strange aroma of desert plants, protect against browsing where there are few plants.

Fragrance and unisexuality.

Dimorphism in Viola tricolor.

Summary

Examined Epilobium 20 or 30 years ago at Shrewsbury. In a flash remembered it as dimorphic, but had forgotten its name.

Summary

Encloses memorandum on tendrils. Nature of tendrils in Modecca.

Summary

His results with pure gum on Drosera spathulata entirely support CD’s opinion. Other observations on insectivorous plants.

Summary

Has examined nearly all British orchids.

Hooker’s error on Listera.

Change in colour and consistency of Drosera hair glands after leaf inflection. Analogous structures in Dionaea. Requests Oliver confirm these observations on live plants, of which he has none.

In a muddle over the effects of salts on insectivorous plants.

Summary

Requests that DO examine enclosed microscope slides of Acropera ovules, to confirm CD’s opinion that females are non-functional.

Can DO comment on disagreement between Robert Brown and John Lindley over the number of Acropera carpels?

O. Heer’s Atlantis theory vs CD’s hypothesis of a migration north during warm periods.

Summary

Thanks for information on Tecoma.

Cannot believe DO’s statement about Catasetum; is sure C. tridentatum sets seeds in its native country.

CD erred on Acropera, but how is it naturally fertilised?