Koenigia as described by Philibert Commerçon is a synonym of Dombeya.
Koenigia is a genus of plants in the family Polygonaceae. The genus Aconogonon has been merged into Koenigia.
Description Species of Koenigia are annual or perennial herbaceous plants, growing from taproots. The flowers are arranged in terminal or axillary inflorescences. The flowers have pale tepals: white, greenish to yellowish white or pink. The seeds are borne in achenes that are usually brown or black in colour and not winged.
Taxonomy The genus Koenigia was erected by Carl Linnaeus in 1767, initially for the type species Koenigia islandica. The boundaries between genera in the family Polygonaceae, and the relationships among them, have long been a problem. At one time, many species were placed in the genus Polygonum. Koenigia is placed in the subfamily Polygonoideae, tribe Persicarieae, whose taxonomic history has been described as "exceptionally convoluted, even by Polygonaceae standards".
A molecular phylogenetic study of the subfamily Polygonoideae in 2015 showed that the genus Koenigia was polyphyletic with respect to the genus Aconogonon. An earlier study had reached a similar conclusion, and had suggested that extra genera be created to maintain monophyletic taxa. The authors of the 2015 study preferred the alternative of merging the two genera, a proposal accepted by other sources. Using broad circumscriptions of the genera, the 2015 study suggested that relationships within the tribe Persicarieae were:
Species , Plants of the World Online accepted the following species:
Koenigia alaskana (Small) T.M.Schust. & Reveal Koenigia alpina (All.) T.M.Schust. & Reveal Koenigia bingchachaensis Xu, B (2026)Xu, B., Sun, H., & Luo, D. (2026). Koenigia bingchachaensis (Polygonaceae), a remarkable new species from the alpine subnival of Bingchacha, Zayü, Xizang, China. Ecology and Evolution, 16(4), e73290. https://doi.org/10.1002/ece3.73290 Koenigia campanulata (Hook.f.) T.M.Schust. & Reveal Koenigia cathayana (A.J.Li) T.M.Schust. & Reveal Koenigia chuanzangensis Z.Z.Zhou & Y.J.Min Koenigia coriaria (Grig.) T.M.Schust. & Reveal Koenigia cyanandra (Diels) Mesícek & Soják Koenigia davisiae (W.H.Brewer ex A.Gray) T.M.Schust. & Reveal Koenigia delicatula (Meisn.) H.Hara Koenigia divaricata (L.) T.M.Schust. & Reveal Koenigia × fennica f(Reiersen) T.M.Schust. & Reveal Koenigia fertilis Maxim. Koenigia filicaulis (Wall. ex Meisn.) T.M.Schust. & Reveal Koenigia forrestii (Diels) Mesícek & Soják Koenigia hedbergii Bo Li & W.Du Koenigia hookeri (Meisn.) T.M.Schust. & Reveal Koenigia islandica L. Koenigia jurii (A.K.Skvortsov) T.M.Schust. & Reveal Koenigia lichiangensis (W.W.Sm.) T.M.Schust. & Reveal Koenigia limosa (Kom.) T.M.Schust. & Reveal Koenigia mollis (D.Don) T.M.Schust. & Reveal Koenigia nepalensis D.Don Koenigia nummularifolia (Meisn.) Mesícek & Soják Koenigia ocreata (L.) T.M.Schust. & Reveal Koenigia panjutinii (Kharkev.) T.M.Schust. & Reveal Koenigia phytolaccifolia (Meisn. ex Small) T.M.Schust. & Reveal Koenigia pilosa Maxim. Koenigia polystachya (Wall. ex Meisn.) T.M.Schust. & Reveal Koenigia relicta (Kom.) T.M.Schust. & Reveal Koenigia rumicifolia (Royle ex Bab.) T.M.Schust. & Reveal Koenigia songarica (Schrenk) T.M.Schust. & Reveal Koenigia tortuosa (D.Don) T.M.Schust. & Reveal Koenigia tripterocarpa (A.Gray) T.M.Schust. & Reveal Koenigia weyrichii (F.Schmidt) T.M.Schust. & Reveal Koenigia yatagaiana (T.Mori) T.C.Hsu & S.W.Chung
Distribution and habitat Koenigia species are found in meadows, along stream banks, or on rocky slopes in arctic, temperate and alpine regions of the Northern Hemisphere.
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