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(First upload on October 1 2012. Last on November 24 2017) [ 日本語 | English ]

Alnus Mill. (ハンノキ), non-native to Japan A. crispa, A. glutinosa, A. mandshurica

Alnus crispa (Aiton) Pursh in Alaska

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Distribution of Alnus crispa

Kyokuhokumiyamahannoki (キョクホクミヤマハンノキ, 極北深山榛ノ木), (American) green alder Life form: deciduous shrub with 3-8 m tall Distribution: Siberia - boreal North America Synonyms: Alnus viridis (Chaix.) D. C. ssp. crispa (Aiton) Turrill, often used Betula crispa Ait. Habitat: sunny, moist soil → wetland (湿原), in particular, on bog Varieties (Hultén 1968) ssp. crispa f. strangula Fern.

ssp. sinuata (Ait.) Pursh var. laciniata Hult. Cf. A. incana (L.) Moench ssp. tenuifolia (Nutt.) Breitung mountain alder or thinleaf alder Distribution western North America (New Mexico to Alaska) Synonyms: A. tenuifolia Nutt.

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[1/2] at Poker Flat near Fairbanks, AK, on August 13 2012.

Alnus glutinosa (L.) Gaertn.

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Seiyouyamahannoki (セイヨウヤマハンノキ), black alder Guruchino-sahannoki (グルチノーサハンノキ) / Yo-rropayamahannoki (ヨーロッパハンノキ) Lifeform: deciduous tree

Distribution: Europe and southwest Asia (not in Japan) Habitat: moist soil Nitrogen-fixing: by a bacterium, Frankia alni

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[1-3] a transplanted tree at the arboretum of Hokkaido Research Center, Forestry and Forest Products Research Institute, in Hitsujigaoka, Sapporo, on July 9 2013. [3] a bark (樹皮).

Alnus mandshurica (Callier ex C. K. Schneider) Handel-Mazzetti

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Manshu-hannoki (マンシュウハンノキ, 満州榛ノ木), Manchurian alder Lifeform: shrub or short tree ≈ 10 m tall Distribution: northeast China - Far East - northern Korea Habitat: streamsides, disturbed forests

Synonyms: Alnus fruticosa Ruprecht var. mandshurica Callier ex C. K. Schneider

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[1-3] on Changbai Mountain, Jilin Province, China, on June 12 2017.