Taxonomy of the Polygonum douglasii (Polygonaceae) complex with a new species from Oregon |
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| Authors: | Mihai Costea François J. Tardif |
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| Affiliation: | (1) Department of Plant Agriculture, University of Guelph, N1G 2W1 Guelph, ON, Canada;(2) Department of Plant Agriculture, University of Guelph, N1G 2W1 Guelph, ON, Canada |
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| Abstract: | The taxonomy of the Polygonum douglasii complex is revised. A summary of relevant taxonomic information is provided, along with a key to the species and subspecies, plus typification, synonymy, discussion, distribution, and ecology. Morphology and micromorphology of stems, leaves, perianth, pollen, and achenes are analyzed and illustrated. Based on these data, 12 species and two subspecies are recognized. A new species, P. gabrielae, is described and illustrated from Oregon. |
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| Keywords: | Polygonum douglasii complex Polygonaceae taxonomy morphology micromorphology |
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