Arrangements for obtaining Carl Nägeli a set of British Hieracium specimens.
Showing 41–60 of 129 items
Arrangements for obtaining Carl Nägeli a set of British Hieracium specimens.
Notes on the taxonomy of Primula.
DO thinks an essay [Alexander Braun’s "Rejuvenescence", Ray Society (1853)] is not worth reading with respect to some difficulty concerning phyllotaxy.
Sends specimens of Byblis, Roridula, and Utricularia for CD’s examination.
Sends information about Indian and Australian species of Aldrovanda, Roridula, and Byblis.
Sends Utricularia montana and Byblis species.
Drosera census numbers 100 species.
Genlisea distinguished from Utricularia.
Sends capsules with results from Genlisea specimens and fragments of Polypompholyx.
The generic name Genlisea must be preserved for Utriculariaceae with five-part calyces.
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.