173 
afterward Chili, Brazil, and Peru. On his return he published, 
among other works, “De Sexu plantarum”’ reread! 1631); 
“ Aphorisimi eae (Tiibingen, 1633); ‘‘Historia generalis 
igre Americanarum”’ (3 vols. Halle, 1635); ‘“(Grundlehren 
r Anatomie und Physiologie der Pflanzen von Amerika” 
(Magdeburg, 1636); ““Sertum Patagonicum et florula peruvien- 
sis’’ (2 vols., Dresden, 1636); ‘“Criptogamae Brasilienses ab 
Gustavius Kehr collectae” (Magdeburg, 1632); and “Reisen in 
Amerika” (2 vols., 1639). 
[Wholly fictitious. The earliest work on sex in plants was the 
‘Epistola de sexu plantarum” of R. J. Camerarius, published in 
1694. The title ‘“Aphorismi botanici’ was probably first 
used in a small volume by C. A. Agardh, commenced in 1817. 
The Word ‘cryptogamia” was first coined by Linnaeus, in 
1737; ‘‘cryptogamae”’ is a much later form of the same word, 
perhaps first used after the year 1800. The earliest work on 
the flora of Peru dates from 1714. The title ‘‘Grundlehren der 
Anatomie und Physiologie der Pflanzen” (without the ridiculous 
“von Amerika’) reappears under ‘‘Nascher’” below, as does 
also the “Criptogamae Brasilienses” title. This account of 
Kehr and his books is the least plausible of all those here re- 
printed; the dates assigned are so much too early that they 
would deceive no one in the least familiar with the history of 
botany.] 
KERCKHOVE, Lorenz Wenceslas (kair-ko ‘-veh), Dutch nat- 
uralist, b. in Bois le Duc in 1785; d. in Amsterdam in 1839. He 
studied in Rotterdam, and early showed a fondness for the 
natural sciences. At the age of sixteen he joined an uncle who 
was established in business in New York; but having made the 
acquaintance of Alexander von Humboldt during his sojourn 
in the United States in 1802, he gave up business and went to 
Central America. He had resolved to follow the steps of the 
German naturalist, and like him write an account of his travels, 
but after visiting the West Indies, Central America, Louisiana, 
Mexico, and Guiana, during 1804-’9, his health declined and he 
was compelled to return to his native land. For several years 
e was professor of natural history in the University of Leyden, 
but resigned in 1821 to devote himself exclusively to science, and, 
settling in Amsterdam, published many works, including * Reisen 
durch Cuba, Porto Rico, Louisiana, Nueva Espaiia und Guiana’ 
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