Clark, Lynn G.

Pratt, Donald B.

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Stephen F. Austin State UniversitySFA ScholarWorksFaculty Publications Biology2001Amaranthus rudis and A. tuberculatus, One Speciesor Two? [Abstract]Donald B. PrattStephen F Austin State University, prattdb@sfasu.eduLynn G. ClarkFollow this and additional works at: http://scholarworks.sfasu.edu/biologyPart of the Biology Commons, and the Plant Biology CommonsTell us how this article helped you.This Abstract is brought to you for free and open access by the Biology at SFA ScholarWorks. It has been accepted for inclusion in Faculty Publicationsby an authorized administrator of SFA ScholarWorks. For more information, please contact cdsscholarworks@sfasu.edu.Recommended CitationPratt, Donald B. and Clark, Lynn G., "Amaranthus rudis and A. tuberculatus, One Species or Two? [Abstract]" (2001). FacultyPublications. Paper 61.http://scholarworks.sfasu.edu/biology/61Amaranthus rudis and A. tuberculatus, One Species or Two? [Abstract]  Waterhemps traditionally have been divided into two species, Amaranthus rudis and A.  tuberculatus, based on morphology, but the distinctions break down for specimens collected  from a major portion of the total waterhemp geographic range. Two hypotheses of waterhemp species circumscriptions were explored using morphological and isozyme data sets.  The first hypothesis holds that there are two waterhemp species as traditionally circumscribed, intermediate morphological materials being hybrids. The second hypothesis holds that there is a single, polymorphic species of waterhemp.  Principal components analysis of pistillate morphological, staminate morphological, and isozyme data sets all show a single waterhemp continuum exhibiting geographic variation.  A single waterhemp species, A. tuberculatus, is proposed.  

Amaranthus rudis and A. tuberculatus, One Species or Two? [Abstract]

http://scholarworks.sfasu.edu/cgi/viewcontent.cgi?article=1060&context=biology

Amaranthus rudis and A. tuberculatus, One Species or Two? [Abstract]

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