EVOLUTIONARY STUDIES OF ATRIPLEX: PHYLOGENETIC RELATIONSHIPS OF ATRIPLEX PLEIANTHA |
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| Authors: | Howard C. Stutz Ge-Lin Chu Stewart C. Sanderson |
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| Affiliation: | 1. Department of Botany and Range Science, Brigham Young University, Provo, Utah, 84602;2. Institute of Botany, Lanzhou, Gansu, China;3. USDA Forest Service Shrub Sciences Laboratory, Provo, Utah, 84601 |
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| Abstract: | ![]()
Atriplex pleiantha Weber differs from all other species of Atriplex in having 1) multiple female flowers subtended by two bracts, 2) female flowers with a perianth, and 3) embryos with radicles pointing downwards. Because of these significant differences it is proposed that Atriplex pleiantha be elevated to the level of a separate genus and be designated Proatriplex pleiantha (Weber) Stutz & Chu. The closest relatives of Proatriplex appear to be Archiatriplex, Endolepis, Exomis, and Microgynoecium. These are all diploid, monoecious annuals, have non-Kranz type leaf anatomy, and female flowers with a perianth. |
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