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(First upload on September 2 2007. Last on October 31 2015) [ 日本語 | English ]

Rhus L. (ウルシ) Tsutaurushi (ツタウルシ, 蔦漆), climbing sumac Lifeform: deciduous vine Habitat: woodland, forest edge, gap Poison: inflammation of the skin by urushiol

Urushiol: R = (CH2)14CH3, (CH2)7CH=CH(CH2)5CH3 (CH2)7CH=CHCH2CH=CH(CH2)2CH3 (CH2)7CH=CHCH2CH=CHCH=CHCH3 (CH2)7CH=CHCH2CH=CHCH2CH=CH2 and others Chromosome number: 2n = 30

→ Introduction to the Ozone Depletion and the Effects of UV Radiation (自然環境学総論) Synonyms: Rhus orientalis (Greene.) C. Schneid. Rhus toxicodendron hispida Engl. Toxicodendron orientale Greene f. rishiriensis (Nakai) Hara (リシリツタ): erect < 2 m in height, non-vine

Rhus ambigua in Hokkaido

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4 5 6

7 8
[1] at the Tomakomai Experimental Forest of Hokkaido University on May 21 2003. [2/3] at the entrance gate of Shinsen Bog, central Hokkaido, on June 24 2007. [4-5] at the formerly Senjaku Course in Teine Skislope on October 5 2009. [6] at a footpath around Onnenai Visitor Center in Kushiro Moor, eastern Hokkaido, on July 2 2014. The leaf shape is highly variable. [7/8] near the parking lot of Mount Koma (flora), southern Hokkaido, on August 4 2015.