Kanji:        蔦漆

Romaji: Tsutaurushi 

Genus & species:    Rhus ambigua

Family & subfamily:Anacardiaceae  (Sumac family)

Notes:   Very poisonous for most people! Climber

Specimen at Takayama: Common around tree stumps, especially at Toyama. Rapidly colonises cleared ground.

Link: http://www.weblio.jp/content/Rhus+ambigua      Poison Ivy.pdf

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Poison Ivy