(First upload on August 28 2007. Last on September 17 2021) [ 日本語 | English ]

Quercus mongolica Fisch. ex Ledeb. var. grosseserrata Rehd. Wils.

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

Quercus L. (コナラ)
Q. mongolica Fisch. ex Ledeb. (モンゴリナラ)
var. grosseserrata (Blume) Rehder et E. H. Wilson
Mizunara (ミズナラ, 水楢), Manchurian oak for the type
Life form: deciduous tree ⇒ becoming giant trees (巨木)
Distribution: Japan (Kyushu - Hokkaido), Sakhalin, south Kuriles

Southern limit: Mount Takakuma, Kagoshima Prefecture, Kyushu

Seed dispersal: gravity or cache

Quercus crispula Blume, often used
Quercus mongolica Fisch. var. crispula (Blume) H. Ohashi

var. liaotungensis (Koidz.) Nakai (ハゴロモナラ)
var. undulatifolia Kitam. et T.Horik., excl. basion. (ミヤマナラ)

Quercus mongolica var. grosseserrata in Hokkaido

[1] Q. mongolica var. grosseserrata forests are developed on the south slope of Mount Usu. This species is considered to be a climax tree in the lowland of the southwestern Hokkaido. Lagre oak trees at Usu-Zenkoji Temple in the city of Date on May 2 2001. [2] a sapling in a forest located in the northern campus of Hokkaido University, N18/W9, North Ward, Sapporo. The height is ca 1 m. [3] probably it is a masting year in 2010. [4] close-up of acorns. [3/4] in Teshio Experimental Forsest, HU, on September 14 2010. [5] a dwarf-formed tree at the seventh station on Mount Apoi (アポイ岳), south-central Hokkaido, on June 15 2016. [6] near the parking lot of Mount Koma (flora), southern Hokkaido, on July 9 2018. Records: along a trail to go the post-mined peatland of Sarobetsu mire, northern Japan, on August 30 2021.

Variations of leaves

[1] leaves at Kirishima, Kyushu Island, Japan, on March 28, 2003. The leaves are extremely smaller in Kirishima than in Hokkaido. When I saw the leaves, it was hard for me to believe that those leaves are Q. mongolica var. grosseserrata. Compare to a palm. [2] a leaf in Tomakomai Experimental Forest, Hokkaido, on September 10 2009. The box is a cigarette case. [3] along a trail in Togendai, Hakone, central Honshu, on August 21 2021.