- News Home
6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
- About Us
The Germ of a New Taxonomy
2 February 1998 7:00 pm
[Editor's Note: This week we feature a ScienceThen that first aired last year.]
Wednesday is the birthday of Augustin Pyramus de Candolle, a French plant taxonomist born in 1778. Candolle introduced key principles into plant classification. He adopted the scheme that plants are divided into three main groups--acotyledons, monocotyledons, and dicotyledons--based on the number of embryonic seed leaves that appear when a shoot begins to grow, or germinate. Candolle argued that the structure and form of organisms, rather than their physiology, should be the basis for classifying species. According to this principle, Candolle proposed that taxonomists look for patterns of symmetry, especially of floral organs, to determine the relatedness of plant groups. Candolle created the Botanical Conservatory and Botanical Garden in Montpellier, France, and left a 17-volume descriptive account of flowering plants and conifers.
[SOURCE: TREVOR I. WILLIAMS, ED., A BIOGRAPHICAL DICTIONARY OF SCIENTISTS (JOHN WILEY & SONS, ED. 3, NEW YORK, 1982).]