(First upload on April 6 2009. Last on November 18 2020) [ 日本語 | English ]

Platanus × acerifolia (Aiton) Willd.

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

⇒ Engler's syllabus (エングラー体系)

Platanaceae T. Lestib. (スズカケノキ科)

One extant genus:
Platanus L. (スズカケノキ)
Approximately 10 species in the world
We commonly call all species platanus (プラタナス) → making confusion
P. occidentalis L. (アメリカスズカケノキ)
P. orientalis L. (スズカケノキ)
P. × acerifolia (Aiton) Willd. (モミジバスズカケノキ)
Lacinia: P. orientalis > P. × acerifolia > P. occidentalis

Fruit: P. orientalis = 3-6, P. × acerifolia = 1-3, and P. occidentalis = 1

Morphological comparisons of three Platanus species (Koishikawa Botanical Garden on March 16 2017)
Leaf margin (tooth) Bark Fruit
P. orientalis deep sloughing off, whitish 3-7 on an axis
P. × acerifolia intermediate sloughing off, mottled white green and dark green mosaics 2-3 on an axis
P. occidentalis shallow tandem, fine shake, dark brown one by one

Platanus × acerifolia in Hokkaido University Campus

Momijibasuzukakenoki (モミジバスズカケノキ, 紅葉葉鈴懸ノ木), London plane tree
Lifeform: deciduous tree
Distribution: transplantation (non-native regions because of the artifial hybrid made in England)

Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト)
HUSTEP: Plants and Plant communities in Japan (flora list)

Leaf: developing remarkable stipule
Probably a hybrid of P. orientalis and P. occidentalis
Synonyms: P. × hispanica Muenchh., P. × hybrida Brot.

[1/2] on Februray 20 2009 at the backyard of Northern Seikyo Restaurant in Hokkaido University Campus. [2] the trunk or bark (樹皮) is characteristic. [3] on a bridge at Sosei River, Sapporo, on July 24 2014. [4] stipules at a flower garden in N12/W2, North Ward, Sapporo, on September 30 2020.

Platanus occidentalis L. in Japan

ST1 ST2 Amerikasuzukakenoki (アメリカスズカケノキ, 亜米利加鈴懸ノ木), American sycamore, or buttonwood
Lifeform: deciduous tall tree
Distribution: eastern North America (introduced to Japan in Meiji Era) Use: street tree

[1/2] a giant tree (巨木) at Hibiya Park, Tokyo, on December 27 2014.


このアメリカスズカケノキは、明治37年(1904)目黒の林業試験場(現: 林試の森公園)から試験場長白沢保美博士の寄贈により、この日比谷公園に植えられた。当時実生後数年たった苗を植え、現在の樹齢は約100年にもなる。

Platanus orientalis L. in Japan

ST1 ST2 Suzukakenoki (スズカケノキ, 鈴懸ノ木), oriental planetree
Lifeform: deciduous tree up to 30 m tall
Distribution: southeastern Europe - western Asia

introduced to Japan in Meiji Era

[1/2] in the Koishikawa Botanical Garden (小石川植物園), the University of Tokyo, on March 16 2017. (giant tree, 巨木)