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C18

Link: linnaeus.c18.net/Letter/L4640 • Carl Linnaeus to Paul Dietrich Giseke, 8 March 1772 n.s.
Dated 1772. Mart. VIII.. Sent from Uppsala (Sweden) to ? (). Written in Latin.

upSUMMARY

Linnaeus has received a letter by Paul Dietrich GisekeGiseke, Paul Dietrich
(1745-1796). German. Physician.
Professor of natural science in Hamburg
in 1771. Correspondent of Linnaeus.
dated 4 January 1772Letter L4614.

The Danes [Martin Hendriksen VahlVahl, Martin Hendriksen
(1749-1804). Danish. Professor of
botany at Copenhagen. Linnaeusís student
1769-1774. Correspondent of Linnaeus.
, Peder Wilhelm EdingEding, Peder Wilhelm
(1746-1808). Danish. Student of
Linnaeus (private studies) in 1771.
Correspondent of Linnaeus.
, Hans TislefTislef, Hans (1732-1788).
Danish. Botanist in Norway. Linnaeusís
student in 1771. Correspondent of
Linnaeus.
] have now left, but Tislef is still sick. Linnaeus has heard nothing from them. Linnaeus is pleased the Giseke in his honourable position can both encourage and teach others the most sweet subject of all [botany] while he still is young.

Giseke had asked Linnaeus about the arbitrarily breathing of the amphibia. Linnaeus answers that the amphibia inhale the air but they do not seem to exhale it; it sort of disappears in the body.

Giseke had written to Linnaeus about Charles AlstonísAlston, Charles (1683-1760).
Scottish. Botanist and physician.
Studied in Leiden under Boerhaave.
Professor of botany and medicine at
Edinburgh.
opinion of plant sexuality. Giulio PontederaPontedera, Giulio (1688-1757).
Italian. Director of the botanical
garden and professor of botany at Padua.
He rejected Linnaeusís system. Linnaeus
named a family of Narcissoides,
Pontederia, after him.
denied plant sexuality. However, Giseke can see the truth of Rudolf Jacob CamerariusísCamerarius, Rudolf Jacob
(1665-1721). German. Professor of
medicine, Tübingen.
experiment: in the spring he can sow Cannabis in a pot in a room. He should eradicate all the male plants before they flower. Giseke will then see that there are no seeds. Giseke should do the same in another room, but leave one male. He will then have seeds! Linnaeus got a prize from St Petersburg for this experiment.

The same can be said about Mercurialis. However, he should not let himself be fooled by Mercurialis ambigena.

Linnaeus, if he is not mistaken, saw one or another male flower around the female Spinacia. He therefore asks Giseke to make an experiment in a pot, where there is no male flower around.

Every Bignonia is androgynous or monoecious in Sweden.

The cones of Lupulus are not fruits but calyces. The calyces can become mature and ripe without fertilization but they cannot yield fertile seeds.

Linnaeus does not want to discuss Phoenix; the matter is known to Giseke.

Linnaeus would like to receive a floret of Aloë uvaria.

Linnaeus asks Giseke to be careful with his eyes.

Linnaeus has received Laplysia, fish and amphibia from America. Mrs. Blackstone [presumably a relative of John BlackstoneBlackstone, John (1713-1753).
British. Botanist and apothecary,
London.
, or his wife Mary BlackstoneBlackstone, Mary (1723-1801).
British. Wife of John Blackstone, born
Abbot.
] has sent Linnaeus many American insects.

upEDITIONS

1. Collectio epistolarum (1792), p. 110-111 .