Sawadaea

Sawadaea
	Sawadaea bicornis growing on a species of maple.
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Helotiales
Family:	Erysiphaceae
Genus:	Sawadaea; Miyabe, 1914
Type species
	Sawadaea aceris; (DC.) Miyabe, 1914

Sawadaea is a genus of fungi in the family Erysiphaceae (powdery mildews). It contains twelve species.^[1]

Description

The fungus forms white patches of mycelium on the leaves of its host.^[2] Some Sawadaea species have a 'spring' and 'autumn' phase. In spring, the mycelium appears on the upperside of leaves. In autumn, it can be found on the undersides.

Taxonomy

The genus was initially circumscribed by Kingo Miyabe in 1914. The genus name of Sawadaea is in honour of Kaneyoshi (Kenkichi) Sawada (1888–1950), who was a Japanese botanist and mycologist. He worked at the College of Agriculture in the National Taiwan University.^[3]

Species

As of Feng et al. (2025):^[1]

Sawadaea acerina G.X. Guan & S.Y. Liu, 2025
Sawadaea aceris-arguti S. Takam. & U. Braun, 2025
Sawadaea aesculi R.Y. Zheng & G.Q. Chen, 1980
Sawadaea bicornis (Wallr.) Homma, 1937
Sawadaea bifida V.P. Heluta, 1990
Sawadaea bomiensis R.Y. Zheng & G.Q. Chen, 1980
Sawadaea koelreuteriae (I. Miyake) H.D. Shin & M.J. Park, 2011
Sawadaea kovaliana V.P. Heluta, 1990
Sawadaea nankinensis (F.L. Tai) S. Takam. & U. Braun, 2008
Sawadaea negundinis Homma, 1937
Sawadaea polyfida (C.T. Wei) R.Y. Zheng & G.Q. Chen, 1980
Sawadaea taii G.X. Guan & S.Y. Liu, 2025
Sawadaea tulasnei (Fuckel) Homma, 1937

References

1 2 Feng J, Guan GX, Wu XL, Liu SY, Song JG, Bradshaw M, Götz M, Braun U, Takamatsu S, Heluta VP, Jin DN, Wang SB, He YH, Zhang ZY, Liu L, Liu TZ, Ilyukhin EV, Lu XX, Li Y (25 April 2025). "Phylogeny and taxonomy of Acer powdery mildews, including genera Sawadaea and Takamatsuella (Erysiphaceae, Ascomycota)". Studies in Mycology. 112: 1–38.
↑ Braun, Uwe; Cook, Roger T. A. (2012). Taxonomic manual of the Erysiphales (powdery mildews). CBS biodiversity series. Utrecht: CBS-KNAW fungal biodiversity centre. ISBN 978-90-70351-89-2.
↑ Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN 978-3-946292-41-8. Retrieved January 27, 2022.

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[Feng-1] 1 2 Feng J, Guan GX, Wu XL, Liu SY, Song JG, Bradshaw M, Götz M, Braun U, Takamatsu S, Heluta VP, Jin DN, Wang SB, He YH, Zhang ZY, Liu L, Liu TZ, Ilyukhin EV, Lu XX, Li Y (25 April 2025). "Phylogeny and taxonomy of Acer powdery mildews, including genera Sawadaea and Takamatsuella (Erysiphaceae, Ascomycota)". Studies in Mycology. 112: 1–38.

[2] Braun, Uwe; Cook, Roger T. A. (2012). Taxonomic manual of the Erysiphales (powdery mildews). CBS biodiversity series. Utrecht: CBS-KNAW fungal biodiversity centre. ISBN 978-90-70351-89-2.

[3] Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN 978-3-946292-41-8. Retrieved January 27, 2022.

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