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(First upload on September 18 2007. Last on October 6 2023) [ 日本語 | English ]

Salix L. (ヤナギ) Mineyanagi (ミネヤナギ, 峰柳), Japanese willow or Miyama willow (tentative) Miyamayanagi (ミヤマヤナギ, 深山柳) Lifeform: deciduous shrub ≈ 1-2 m tall (or less → higly variable, occasionally becoming at 5 m tall in lowland) Distribution: Japan and southern Kuril Islands (Ohwi & Kitagawa 1983) Habitat: alpine and subalpine zones, serpentine zones often on volcanoes in Hokkaido (e.g., Eniwa and Yotei) flora on the volcanoes Mounts Koma, Usu

Patches in permanent plots on the summit area of Mount Koma on July 4 2002. Synonyms Salix reinii Franch. et Sav. ex Seemen f. cyclophylloides (Koidz.) Kimura ex Ohwi et Kitag., nom. nud. Salix shikotanica Kimura f. eriocarpa (Kimura) T. Shimizu (キヌゲミヤマヤナギ): Hokkaido - Honshu, floccose hair on ovary f. pendula Kimura (シダレミネヤナギ)

Salix reinii on mountains in Hokkaido

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Mount Koma

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[1] a S. reinii patch with flowering Platanthera metabifolia on July 18 1996. The relationships of these two species may be explained by facilitation (定着促進効果) (Uesaka & 2004). [2] a black instrument on the ground surface is a PAR sensor on June 27 2005. [3] on June 16 2015.

4 5 6
[4/5] leaf flushing with inflorescences on May 18 2012. [6] Snow was accumulated in the leeward of S. reinii patches that functioned as a shelter to prevent from frost injury (on November 21 2005. The patches greatly change the microclimate (Tsuyuzaki et al. 2012).

ECM on S. reinii roots

Fig. Ectomycorrhizae from the roots of S. reinii. M: mantle. The sample was collected from the southwest slope of Mount Koma (Tsuyuzaki et al. 2005)

Mount Tarumae

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[1] a patch. [2] close-up of inflorescences. On June 12 2008.

Mount Fuppushi (風不死岳)

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[1/2] at the summit on June 28 2023.

Mount Yotei

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[1-3] near the summit on June 28 2014.

Mount Tokachi

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[1] near the bothie (hut escaped from mountainous disasters) of Mount Tokachi, central Hokkaido, on June 27 2017.

Mount Mashu

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[1/2] on the middle slope of Mount Mashu, eastern Hokkaido, on June 26 2019.