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(First upload on September 6 2008. Last on December 9 2020) [ 日本語 | English ]

Alnus Mill. (ハンノキ) Hannoki (ハンノキ, 榛ノ木), Japanese alder Yachihannoki (ヤチハンノキ, 谷地榛ノ木), commonly called Life form: deciduous shrub-tree Distribution: East Asia (China - Japan) Habitat: wet lowland (fen) ⇒ wetland (湿原) Field training on integrated environmental research (統合環境調査法実習) Use: tannin extract, bark and branch used as medicine (in China)

Pollen allergy (花粉症): a small amount of pollens dispersed in early spring → person who has alder pollen allergy has high risk to develop white birch pollen allergy var. arguta Call., or f. arguta (Regel) H. Ohba (エゾハンノキ) var. koreana Call., f. koreana (Callier) H. Ohba (ケハンノキ), dense auburn hair on young shoots and leaves var. formosana (Burkill) Callier (タイワンハンノキ)

Alnus japonica in Hokkaido

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[1] close-up of female inflorescences (see males of A. maximowiczii). [1/2] at a forest edge near Utonai Lake on June 11 2008. [3] in Makunbetsu Swamp (マクンベツ湿原) on April 24 2010. [4] along Sakushukotoni River in the experimental farm of Hokkaido University, Sapporo, on July 28 2017. [5/6] along a stream near Onnenai Visitor Center in Kushiro Moor, eastern Hokkaido, on July 2 2014. ⇒ a giant tree (巨木) in Yachidamo Park (Yachidamo = Fraxinus mandshurica), N28E4, East Ward, Sapporo, on May 6 2015. [7] in Shiretoko Five Lakes Aera, eastern Hokkaido, on August 29 2020. [8] along Tonneusu Pond (トンネウス沼) in the North Ward of Sapporo on November 7 2020.