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(First upload on April 13 2010. Last on December 17 2021) [ 日本語 | English ]

Salix L. (ヤナギ) Shiroyanagi (シロヤナギ, 白柳), Yezo willow* Lifeform: deciduous tree < 25 m high Distribution: northern Honshu and Hokkaido, Japan Habitat: riverfront (riparian) Seed dispersal: wind Synonyms: Salix dolichostyla Seemen, recently accessed New combinations for the infraspecific taxa and names of hybrids of S. dolichostyla are presented. Salix dolichostyla has been recorded from the Far East, but is endemic to Japan. Lectotype of S. jessoensis is designated. (Ohashi 2006)

ssp. serissifolia (Kimura) H. Ohashi Kogomeyanagi (コゴメヤナギ, 小米柳) Distribution: endemic to Japan (Kanto, Chubu and Kinki District) Habitat: sunny riversides, wetlands Synonyms: Salix dolichostyla Seemen ssp. serissifolia (Kimura) H. Ohashi et H.Nakai, discarded f. pendula (Okuhara) H. Ohashi et H. Nakai (シダレコゴメヤナギ), discarded Salix serissifolia Kimura Ohashi H. 2006. Salix dolichostyla Seemen, a correct name for S. jessoensis Seemen (Salicaceae). Journal of Japanese Botany 81: 91-97

Salix jessoensis in Japan

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[1-3] near the Institute of Low Temperature Science, Hokkaido University, on October 6 2009. Thank Niiyama-san! [4-6] along Hirose River close to Sendai International Center, northern Honshu, on March 23 2016. [7] in Shin-Kotoni Jinja (Shrine), North Ward, Sapporo, on July 25 2020. [8] on a sandbar along Toyohira River, Sapporo, on July 14 2020. The specimen is kept in SAPS.

Giant tree (巨木)

Shojin River (精進川)

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[1-3] in Shojin River Streamside Park along a trail near Shojin Falls, Sapporo, on September 18 2021.

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ssp. serissifolia

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[1/2] in the salicetums of Botanic Gardens, Tohoku University, Natural Monument Aobayama, northern Honshu, on March 22 2016. [Data] HB. 823. Salix serissaefolia Kimura. Nom Jap. コゴメヤナギ. Hab. Prov. Sagami-Kamakura. Coll. et Donat. Mr. Y. Hasegawa. Plant. 13 Mar. 1985-Jun. 1991. ⇒ bark (樹皮)