As a part of comprehensive study on the taxonomy of the Korean Alismataceae, the patterns of morphological variation of Sagittaria sagittifolia-S. aginashi complex which showing the complicated variation patterns in leaf character were examined using numerical anyalses to determine the species limits based on leaf morphology. As a results, this complex could be identified as three taxa. S. aginashi has the more narrow and acute leaves, whereas S. sagittifolia var. edulis has the more broad and obtuse leaves, and S. sagittifolia var. leucopetala showed the intermediate leaf morphology between S. aginashi and S. sagittifolia var. edulis.
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