For example, Buckwheat ( " Fagopyrum esculentum " ) has sometimes been included in the genus as " Polygonum fagopyrum ".
2.
Propelargonidins can be found in the rhizomes of the fern " Drynaria fortunei ", in buckwheat ( " Fagopyrum esculentum " ), in the edible halophyte " Mesembryanthemum edule ".