Koenigia lapathifolia, the Correct Name for Koenigia alaskana (Polygonaceae)

The combination Koenigia alaskana (Small) T.M.Schust. & Reveal is illegitimate because its basionym, Polygonum alpinum alaskanum Small, is a superfluous replacement name for Polygonum alpinum var. lapathifolium Cham. & Schltdl. The correct combination, Koenigia lapathifolia (Cham. & Schltdl.) M.van der Meer, is proposed.