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(First upload on May 1 2008. Last on August 3 2022) [ 日本語 | English ]

Equisetum L. (トクサ) Sugina (スギナ, 杉菜) or Tsukushi (ツクシ, 土筆), common horsetail (field horsetail) Lifeform: a bushy, perennial, and rhizomatous horsetail Morophology: highly variable (often misidentified) Distribution: native to the Northern Hemisphere (cosmopolitan) Habitat: common on roadside, waste ground, and grassland

HUSTEP: Plants and Plant communities in Japan (flora list) Nature on lakes, volcanoes, sea and forests (海と湖と火山と森林の自然) f. boreale (Bong.) Milde (オクエゾスギナ), triangular branches f. campestre (Schultz) Klinge (ミモチスギナ), developing sporphylls on the vegetative shoots, non-specific forma

Equisetum arvense in the Northern Hemisphere

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1 2 3
4 5 6
7 8 9
[1] fertile stems, taken in front of GSEES, Hokkaido University, Sapporo, on April 22, 2008. [2] at the mouth of Haboro River, northern Hokkaido, on April 24 2016. [3] vegetative stems in back of Faculty of Agriculture, HU, on April 29, 2009. [4] on a grassland dominated by E. arvense on May 20 2017. [5/6] at the side of a building (guest house) in Tomakomai Experimental Forest on September 14 2017. [7] the shoots emerged from underneath blacktop, N28/E2, East Ward, Sapporo, on April 29 2019. [8/9] at a road side in N24/W2, North Ward, Sapporo, on May 3 2022.

f. campestre

1 2
[1/2] at a roadside, N28/E2, Sapporo, on August 3 2015.

Morphology sketched on May 10 1983. The sample was taken in the HU campus.

Near Toolik Lake LTER Station, interior Alaska, on August 8 2009. You also see Equisetum variegatum in the back.