Alnus hirsuta

Alnus hirsuta
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Embryophytes
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fagales
Family:	Betulaceae
Genus:	Alnus
Species:	A. hirsuta
Binomial name
	Alnus hirsuta; (Spach) Rupr.
Synonyms
	Synonymy Alnus hirsuta f. inokumae (Murai & Kusaka) H.Ohba ; Alnus hirsuta f. macrophylla Callier ; Alnus hirsuta var. microphylla (Nakai) Tatew. ; Alnus hirsuta f. sibirica (Spach) H.Ohba ; Alnus hirsuta var. sibirica (Spach) C.K.Schneid. ; Alnus incana var. glauca Regel ; Alnus incana var. hirsuta Spach (1841) (basionym) ; Alnus incana subsp. hirsuta (Spach) Á.Löve & D.Löve ; Alnus incana f. hirsuta Regel ; Alnus incana var. sibirica Spach ; Alnus incana subsp. tchangbokii Chin S.Chang & H.Kim ; Alnus incana var. tinctoria (Sarg.) H.J.P.Winkl. ; Alnus inokumae Murai & Kusaka ; Alnus sibirica (Spach) Turcz. ex Kom. ; Alnus sibirica f. acutiloba Koidz. ; Alnus sibirica f. glabra (Callier) Koidz. ; Alnus sibirica var. hirsuta (Spach) Koidz. ; Alnus sibirica f. hirsutoides Koidz. ; Alnus sibirica f. obtusiloba Koidz. ; Alnus sibirica var. oxyloba C.K.Schneid. ; Alnus sibirica var. paucinervis C.K.Schneid. ; Alnus sibirica var. tinctoria (Sarg.) Koidz. ; Alnus tinctoria Sarg. ; Alnus tinctoria f. acutiloba (Koidz.) H.Hara ; Alnus tinctoria var. glabra Callier ; Alnus tinctoria f. hirsutoides (Koidz.) H.Hara ; Alnus tinctoria var. mandschurica Callier ; Alnus tinctoria var. microphylla Nakai ; Alnus tinctoria var. obtusiloba Callier ; Alnus tinctoria var. velutina H.Hara ; Alnus viridis var. sibirica (Spach) Regel, nom. illeg. homonym. post. ;

Alnus hirsuta is a species of flowering plant in the family Betulaceae. It is a tree native to Japan, Korea, northern China, the Russian Far east, and eastern Siberia.^[2] It is closely related to grey alder Alnus incana, and has sometimes been treated as a subspecies of it Alnus incana subsp. hirsuta (Spach) Á.Löve & D.Löve on the grounds that it hybridises freely with it when brought together in cultivation.^[3] It differs from grey alder in larger leaves and larger seed catkins.^[4]

Description

It is a tree growing to 20–25 metres (66–82 ft) tall, usually with a single, straight trunk, with grey bark. The leaves are green above, grey-green below, with coarsely double-toothed margins, 3–11 cm (1.2–4.3 in) long and 2.5–9 cm (1.0–3.5 in) broad.^[5]

References

↑ Shaw, K.; Roy , S.; Wilson, B. (2014). "Alnus hirsuta". IUCN Red List of Threatened Species. 2014 e.T194610A2352509. doi:10.2305/IUCN.UK.2014-3.RLTS.T194610A2352509.en. Retrieved 13 August 2026.
1 2 "Alnus hirsuta (Spach) Rupr". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 August 2026.
↑ Löve, Áskell; Löve, Doris (1975). "Nomenclatural Notes on Arctic Plants". Botaniska Notiser. 128: 505–506. Retrieved 13 August 2026.
↑ Bean, W. J. (1976). Trees & Shrubs Hardy in the British Isles. John Murray. pp. 276–277. ISBN 0-7195-1790-7.
↑ Baxter, T.; McAllister, H.A. (2026-08-12). "Alnus hirsuta (Spach) Rupr". Trees and Shrubs Online. Retrieved 2026-08-13.

[iucn-1] Shaw, K.; Roy , S.; Wilson, B. (2014). "Alnus hirsuta". IUCN Red List of Threatened Species. 2014 e.T194610A2352509. doi:10.2305/IUCN.UK.2014-3.RLTS.T194610A2352509.en. Retrieved 13 August 2026.

[powo-2] 1 2 "Alnus hirsuta (Spach) Rupr". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 August 2026.

[Löve-3] Löve, Áskell; Löve, Doris (1975). "Nomenclatural Notes on Arctic Plants". Botaniska Notiser. 128: 505–506. Retrieved 13 August 2026.

[Bean-4] Bean, W. J. (1976). Trees & Shrubs Hardy in the British Isles. John Murray. pp. 276–277. ISBN 0-7195-1790-7.

[s350-5] Baxter, T.; McAllister, H.A. (2026-08-12). "Alnus hirsuta (Spach) Rupr". Trees and Shrubs Online. Retrieved 2026-08-13.

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