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(First upload on December 23 2009. Last on November 1 2013) [ 日本語 | English ]

Populus L. (ヤマナラシ) P. tremula L. This taxon is undergoing name changes Lifeform: deciduous tall tree Distribution: Korea - Japan Habitat: sunny montane, often developing simultaneous forests after disturbances (撹乱), such as wildfire (森林火災) and logging var. tremula (ヨーロッパヤマナラシ, common aspen): the type var. davidiana (Dode) C.K.Schneid. (エゾヤマナラシ/チョウセンヤマナラシ)

Morphology: hairless young shoots and leaves. petiole length ≥ blade length, no nectaries at the base of blade Distribution: Sakhalin - north and eastern Hokkaido - southern Kuril Synonyms: P. davidiana Dode P. davidiana Dode f. laticuneata Nakai P. glandulosa (Uyeki) Uyeki P. jesoensis Nakai var. sieboldii (Miq.) Kudo (ヤマナラシ) Morphology: not as var. davidiana

Synonyms: P. sieboldii Miq. Forest Reserve for P. tremula 4th forest crew and the sub-crew in Kyushu University Experimental Forest at Ashoro Regeneration is often conducted by root-sprouting (根萌芽) → stimultaneous forest by a few clones

Populus tremula in Hokkaido

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var. davidiana

1 2
[1] an aspen forest after a disturbance. [2] a bark (樹皮). [1/2] at Ashoro Experimental Forest of Kyushu University, eastern Hokkaido, on June 25 2013.

var. sieboldi

1 2 3 4 5 6
[1/2] on the southwestern slope of Mount Koma on October 22 2009. [3/4] large winter buds and male flowers on the middle slope of Mount Koma on July 21 2011. [5] large winter bdus on the middle slope on May 18 2012. It was at dusk. [6] a sprout at Tomamu skislope on July 19 2012.
⇒ flora on Mount Koma