ヤナギ (Willow)
ヤナギ属 Salix L. [Salicaceae]
- ヤナギ科 Salicaceae L.
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北半球暖帯-寒帯。種間雑種極めて多。高木-低木。材軽く柔らかい
葉互生分裂しない。托葉有。雌雄異株。尾状花序
個々の花は苞腋に生じ無花被。杯状-指状の腺体。雄蕊1-多数。子房1室。花柱2-4。種子に胚乳なし1. 冬芽鱗片は1枚(2枚が合生し1つ)。縁重なるか合生し帽子状に落ちる
2. 尾状花序立つ。花虫媒で腺体有。柱頭宿存 ________________ Salix ヤナギ
2. 尾状花序下垂nodding。柱頭は花柱の上部と共に落ちる3. 風媒。腺体無 _____________ Chosenia ケショウヤナギ (C. bracteosa)
3. 虫媒。腺体有 ____________________________ Toisusu オオバヤナギ1. 冬芽の鱗片は多数で瓦状に並ぶ。杯状の腺体有。風媒 _____ Populus ヤマナラシ
- ヤナギ属 Salix L.
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世界約400種 (ca 400 spp. in the world)。日本に90種 (90 spp. in Japan)
落葉性高木・低木 (deciduous trees and shrubs)
葉互生、托葉有。種間雑種極めて多種子散布 (seed dispersal): 風
北半球温帯・冷帯に多くが分布 (mostly in the cold and temperate zones of the Northern Hemisphere)
- 北海道のヤナギ Salix in Hokkaido
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イヌコリヤナギ Salix integra Thunb.
エゾノバッコヤナギ Salix hultenii Floderus
キツネヤナギ Salix vulpina Anderss.
シロヤナギ Salix jessoensis Seemen
ミネヤナギ Salix reinii Franch. et Savat. ex Seemen.
ナガバヤナギ Salix sachalinensis Fr. SchmidtTransplantation in Hokkaido University Campus
シダレヤナギ Salix babylonica L.
Salix sp. sketched by ST On April 27 1983. The sample was collected in the Hokkaido University campus. - 極地のヤナギ Salix in Arctic
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Salix polaris Wahlenberg [Arctic Willow]
Salix pulchra Cham. [Diamond-leaf Willow] [syn. Salix planifolia Pursh subsp. pulchra (Cham.) Argus]
Salix reticulata L. [Net-leaf Willow] - References
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- エングラー体系 (Engler's syllabus)
- Flora on Mount Koma
- Flora on Mount Usu
- Tsuyuzaki, S., Sawada, Y., Kushida, K. & Fukuda, M. 2008. A preliminary report on the vegetation zonation of palsas in the Arctic National Wildlife Refuge, northern Alaska, USA. Ecological Research 23: 787-793
