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the concept of species

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2/7/2013 1 What is a Species? A B C D E F Lactuca sativa Family Asteraceae Brassicaoleracea Family Brassicaceae Brassicaoleracea Family Brassicaceae Pistiastratiotes Family Araceae Sedum spectabile Family Crassulaceae Brassica rapa Family Brassicaceae Wild mustard Kohlrabi Kale Cabbage Brussels sprouts broccoli cauliflower CONCEPT OF SPECIES Why do we need to know what a species is? • Utility  –Delimit groups of organisms along natural fault lines, so that approximately the same groupings can be recovered by independent observers • Basic rank of classification • Order and retrieve information on individual specimens in collections or data banks

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