colpus

colpus(pl. colpi) A germinal groove or aperture on the surface of a pollen grain, which is elliptical or approximately rectangular in shape and at least twice as long as it is wide. The shape and arrangement of colpi are diagnostic in the identification of pollen.

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MICHAEL ALLABY. "colpus." A Dictionary of Ecology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

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