CANYON – When disease and insect problems in crops are visible to the naked eye, it may be too late to treat. That’s why Dr. Christian Nansen, Texas AgriLife Research entomologist, likes to take a ...
Taxon, Vol. 18, No. 2, Smithsonian Summer Institute in Systematics 1968, Part 2 (Apr., 1969), pp. 204-212 (9 pages) In response to skeptics who feel that the contribution of paleobotany to phylogeny ...
The chemical approach to plant classification with special reference to the higher taxa of Magnoliophyta / A. Takhtajan -- Chemical plant taxonomy : a generalist's view of a promising specialty / A.
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