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(First upload on July 31 2010. Last on July 16 2017) [ 日本語 | English ]

Alnus hirsuta Turcz.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Alnus Mill. (ハンノキ) in Japan


Developing root tubercles (根粒)
Subgenus Alnus (ハンノキ): dormant bud or winter bud without stalk, fruits developing wing
A. fauriei Lev. et Van't. (ミヤマカワラハンノキ)
A. hakkodensis Hayashi (サルクラハンノキ)
A. hirsuta Turcz. (ヤマハンノキ)
A. japonica (Thunberg) Steud. (ハンノキ)
A. matsumurae Callier (ヤハズハンノキ)
A. serrulatoides Callier (カワラハンノキ), south to Chubu District
A. trabeculosa Hand.-Mazz. (サクラバハンノキ)
Subgenus Alnaster (ヤシャブシ): dormant bud or winter bud with stalk, fruits not developing wing
A. firma Sieb. et Zucc. (ヤシャブシ)

var. hirtella Franch. et Savat. (ミヤマヤシャブシ)

A. maximowiczii Call. (ミヤマハンノキ)
A. pendula Matsumura (ヒメヤシャブシ/ハゲシバリ)
A. sieboldiana Matsumura (オオバヤシャブシ)
Hybrids
A. × borealis Koidz. (ヒロハハンノキ)
A. × hosoii Mizushima (イワキハンノキ)
A. × mayrii Call. (ウスゲヒロハハンノキ/クシロヒロハハンノキ) = A. japonica × A. hirsuta, Korea - northern Honshu - Hokkaido
A. × moriokaensis Murai (モリオカハンノキ)
A. × peculiaris Hiyama (タルミヤシャブシ)
A. × suginoi Sugimoto (ウラジロカワラハンノキ)
Non-Japanese
A. crispa (Aiton) Pursh
A. glutinosa (L.) Gaertn. (セイヨウヤマハンノキ)
A. mandshurica (Callier) Hand.-Mazz. (マンシュウハンノキ)

Alnus hirsuta in Hokkaido


Alnus Mill. (ハンノキ)
Yamahannoki (ヤマハンノキ, 山榛ノ木, s.l.), manchurian alder
var. hirsuta
Keyamahannoki (ケヤマハンノキ, 毛山榛ノ木)
Life form: deciduous tree < 20 m in height
Distribution: northeast Asia, including Japan → Flora on Mount Usu
Habitat: secondary forests (often used for erosion control)

Field training on integrated environmental research (統合環境調査法実習)

var. microphylla (Nakai) Tatewaki (コバノヤマハンノキ/タニガワハンノキ), separated to A. inokumae Murai et Kusaka
Distribution: north to central Honshu
Leaf: smaller than the type, much silky hair on the back
Synonyms:

Alnus inokumae Murai et Kusaka

var. sibirica (Fischer) C. K. Schn. (ヤマハンノキ/マルバハンノキ, s.s.)
Leaf: pruinose and hairless on the back
索引

Alnus1 Alnus2 Alnus3
Alnus4 Alnus5 bark
[1/2] in the caldera rim of Mount Usu on July 21 2010. [3] a sapling on a slope of Tomamu skislope on July 19 2012. [4-6] along Shunbetsu River, south-central Hokkaido, on June 14 2016 (bark, 樹皮).

Mount Koma

Alnus1 Alnus2 Alnus3 Alnus4
[1-3] on the southwestern slope of Mount Koma (flora) on July 10 2017. [4] many galls formed by Eriophyidae (フシダニ) on the trail near the parking lot on June 9 2018.

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