Ferdinand Cohn has already sent a copy of his article, [possibly: "Über die Function der Blasen von Aldrovanda und Utricularia", Beitr. Biol. Pflanz. 1 (1870–5) pt 3: 71–89].
Showing 1–20 of 82 items
Ferdinand Cohn has already sent a copy of his article, [possibly: "Über die Function der Blasen von Aldrovanda und Utricularia", Beitr. Biol. Pflanz. 1 (1870–5) pt 3: 71–89].
Enquiring about cleistogamic flowers of Oxalis.
Discusses possible cleistogamic flowers in Oxalis.
Thanks for mentioning J. G. Kurr on nectaries [Untersuchungen über die Bedeutung der Nektarien in den Blumen (1833)]. Requests observations on flowers with curved pistils. Finds they curve toward nectary, thus lying in path of insect.
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].
Thanks for reference to Annales des Sciences Naturelles.
Requests DO observe rate at which Australian Drosera closes.
On detection of nitrogen in organic fluids.
Lists of nitrogenous organic fluids that produce contraction in Drosera, and details of how to reproduce results.
Sends address.
Delighted to try experiments on Drosera spathulata.
A poser: carbonate of soda produces inflection rather than contraction in Drosera. Possible solution: glands at end of hairs absorb as well as secrete. Fascinated by currents in cells after inflection.
Requests Dionaea now that he knows Drosera so well. Wants to compare fluids secreted; in Drosera they are acid and have antiseptic effect on meat.
Requests DO apply carbonate of ammonia to sensitive hair of Dionaea and measure reaction time. Wants to compare Drosera and Dionaea.
Wants to amend request [see 2946] if DO wants to try carbonate of ammonia experiment. Put third drop on midrib of leaf [of Dionaea] or inside upper side.
Sorry DO already has Origin. Would he like Journal of Travels [Journal of researches]?
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.
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.
The best way to see cell movement in Drosera hair, is to cut off those lately inflected over a fly, sketch shape of red matter under high power, and repeat after one or two minutes.
Will take Natural History Review, but cannot write for it.
Has mass of notes on irritability in orchids,
but he ought to work on Variation.
Drosera was an interlude while away from home. Expectations for effect of carbonate of ammonia on Dionaea. The important phenomenon in Drosera is the segregation of the red fluid within the leaf, not action of carbonate of ammonia on the red fluid.
Compliments DO on his wealth of information.
Henrietta’s relapse.
Thanks for extract on Drosera.
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.
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.