Roux, Stanley J.583972192008-08-282017-05-112008-08-282017-05-112004http://hdl.handle.net/2152/1417textelectronicengCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.Ceratopteris richardiiPolarity (Biology)Thesis3150930