(First upload on Dec. 31 2008. Last on February 23 2011) [ 日本語 | English ]

Trochodendron aralioides Siebold et Zucc.

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


One species, one genus, and one family ⇒ Engler's syllabus (エングラー体系)

Trochodendraceae Eichler (ヤマグルマ科)

Trochodendron Siebold et Zucc.

T. ralioides Siebold et Zucc. (ヤマグルマ, 山車), wheel tree

f. longifolium (Maxim.) Ohwi (ナガバノヤマグルマ)

Lifeform: evergreen tree
Distribution: Taiwan - southern Korea - Japan (south to Yamagata Prefecture)
Habitat: tending to establish on exposed rocks

5-20 mになる常緑樹。花期は5月中旬から6月中旬。別名トリモチノキと呼ばれ、樹皮からトリモチができる。本種は導管を持たないため、植物分類学上、原始的な植物と考えられてきた。
Evergreen tree or large shrub, up to 5-15 (-20 m in height. Native to SE areas of Japan with an E Asia endemic distribution. Yellowish green flowers with ca. 50 stamens surrounding 5-10 carpels open in middle of May to middle of June. The wood has secondary xylem without vessel elements: a feature quite unusual in angiosperms. The sole species in the genus, and sometimes used for bird liming, made from its bark.

on Mount Misen (14-03-16)