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The systematic significance of seed morphology in portulaca portulacaceae under scanning electron microscopy



The systematic significance of seed morphology in portulaca portulacaceae under scanning electron microscopy



Systematic Botany 11(2): 302-308



Seeds of seven southeastern and one southwestern United States species of Protulaca were examined with the scanning electron microscope [The species are P. oleracea, P. pilosa, P. umbraticola, P. rubricaulis, P. retusa, P. smallii, P. amilis and P. grandiflora]. Some species could be characterized by the external seed morphology while others could not. Those species with the largest geographical ranges and ecological diversities showed the greatest variation in morphology. Comparison between species can be often showed significant overlap of morphological characteristics. Seed morphology in Portulaca can be used as a taxonomic trait, but should be combined with other traits for the diagnostic determination of species.

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Accession: 006778076

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DOI: 10.2307/2419120


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