428 i Flora Unveiled
- Van Nigtevecht, G. (1967), Genetic Studies in Dioecious Melandrium. Springer, p. 336.
- Farley, J. (1982), Gametes & Spores: Ideas About Sexual Reproduction 1750– 1914. Johns
Hopkins University Press, p. 39. - Delaporte, F. (1982), Nature’s Second Kingdom. MIT Press, p. 119; Pinto- Correia, C. (1997),
The Ovary of Eve: Egg and Sperm and Preformation. University of Chicago Press, p. 209. - Ewan, J. (1982), Smellie’s “Philosophy of Natural History.” Ta x o n 31:462– 466.
- George, S. (2007), Botany, Sexuality, and Women’s Writing (1760– 1830). Manchester
University Press. - Wollstonecraft, M. (1795), An Historical and Moral View of the Origin and Progress of the
French Revolution and the Effect it Has Produced in Europe. J. Johnson. Accessed online July 12,
2015, http:// oll.libertyfund.org/ titles/ 226 - George, Botany, Sexuality, and Women’s Writing, p. 121.
- Morton, A. G. (1981), History of Botanical Science. Academic Press.
- Mayr, E. (1986), Joseph Gottlieb Kolreuter’s contributions to biology. Osiris 2:135– 176. See
also Olby, R. C. (1966), Origins of Mendelism. Constable, pp. 37– 38; and Roberts, H. F. (1929),
Plant Hybridization Before Mendel. Princeton University Press. - Among the frequent guests at Princess Caroline’s salon were Johann Wolfgang von
Goethe, Christoph Willibald Gluck, Johann Gottfried von Herder, Friedrich Gottlieb
Klopstock, and other luminaries. A member of the Copenhagen Academy of Arts, she was
an accomplished pastel artist as well as a member of the harpsichordist court orchestra. She
was particularly interested in the sciences, including botany, zoology, physics, medicine,
mineralogy, geology, and chemistry. Her vast mineral collection, some of which she collected
in the field herself, formed the basis of the future National Collection of Natural History in
Karlsruhe. - Mayr, Joseph Gottlieb Kolreuter’s contributions to biology.
27. Ibid. - Fraternal twins can indeed be conceived by two fathers, a rare phenomenon called hetero-
paternal superfecundation, which occurs when two (or more) of a woman’s eggs are fertilized by
different men within the same ovulation period, as occurs frequently in dogs and cats. - For a comprehensive discussion, see Mayr, Joseph Gottlieb Kolreuter’s contributions to
biolog y. - In fact, the most successful application of hybrid vigor to agriculture has been not
trees, but maize, with more than 95% of corn acreage planted in hybrid varieties. Other crops
improved by hybrid vigor include sorghum, rice, sugar beet, onion, spinach, sunflowers, broc-
coli, and cannabis. - Koelreuter, J. G. (1961), Vorläufige Nachricht von einigen das Geschlecht der Pflanzen
betreffenden Versuchen und Beobach- tungen [Preliminary Report of Some Experiments and
Observations on the Sexuality of Plants]. An English translation by Margaret Mayr and
Ernst Mayr is available in the library of the Department of the History of Science at Harvard
University.
32. Ibid. - Hagen, H. A. (1884), Christian Conrad Sprengel. Nature 29:572– 573.
- Most of the biographical information for this section is from Zepernick, B., and W. Meretz
(2001), Christian Konrad Sprengel’s life in relation to his family and his time. On the occasion of