Block, Timothy A. <br/><br/>
Aquatic plants of Pennsylvania  a complete reference guide /  [electronic resource] : 
Timothy A. Block and Ann Fowler Rhoads ; illustrations by Anna Ani�sko. 
 - Philadelphia :  University of Pennsylvania Press,  c2011. 
 - vi, 308 p. :  ill. (some col.), col. maps. 
<br/><br/> "Morris Arboretum of the University of Pennsylvania." 
<br/><br/>Includes bibliographical references and index. 
<br/><br/>Evolution and ecology -- Identification keys -- Emergent plants -- Floating-leaf plants -- Thalloid and/or tiny floating plants -- Submergent leafy-stemmed plants -- Submergent rosette forming plants -- Submergent plants with finely divided leaves. 
<br/><br/><br/>Electronic reproduction. Ann Arbor, MI : ProQuest, 2015. Available via World Wide Web. Access may be limited to ProQuest affiliated libraries. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Aquatic plants--Pennsylvania--Identification.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>QK183  / .B56 2011 
<br/><br/><label>Dewey Class. No.: </label>581.7/609748