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(First upload on September 15 2008. Last on October 19 2018) [ 日本語 | English ]

Lactuca scariola L.






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

Lactuca L. (アキノノゲシ)
Togechisya (トゲチシャ, 刺萬苣), prickly lettuce
Life form: annual - biennial forb
Distribution: widespread weed in cool to tropical regions (exotic to Japan)
Habitat: sunny sites, e.g., crop field, waste ground, roadside verge

Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト)

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Chromosome number: 2n = 18
Synonyms:

Lactuca serriola L., the standard

f. integrifolia (Bogenh.) G. Beck. (マルバトゲチシャ): leaves non-laciniated
索引

Lactuca scariola in Hokkaido


ST1 ST2 ST3
ST4 ST5 ST6
[1/2] at N25/W1, North Ward, Sapporo, on July 28. [3] at a roadside in N28/E2, East Ward, Sapporo, on August 21 2018. [4] at N15/W1, North Ward, Sapporo, on July 19 2017. [5] at MAX PSU South Station, Portland, Oregon, on August 8 2017. [6] along a paved road in N28/E2, East Ward, Sapporo, on July 14 2020. Discard: in a parking lot along a radoside, West Ward, Sapporo, on August 30 2008.

f. integrifolia

ST6
[1] at N25/W1, North Ward, Sapporo, on August 1 2011. This species has dimorphic leaves.

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