Polygonum × difficile Gand.
This is a synonym of
Persicaria × hybrida (Chaub. ex St.-Amans) Soják
Polygonum × difficile Gand. appears in other Kew resources:
First published in Rev. Bot. Bull. Mens. 1: 93 (1882)
Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
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