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(Upload on March 7 2024) [ 日本語 | English ]

Spergula L. (オオツメクサ) S. arvensis L. (オオツメクサ, 大爪草, s.l.), corn spurry, stickwort, starwort or spurrey Lifeform: weedy, annual/prennial forb with 20-50 cm in height Distribution: widespread in temperate regions introduced to Japan in Meiji Era Habitat: roadsides, farmland, sand dunes and coniferous woodland Chromosome number: 2n = 18 and 36 var. arvensis (ノハラツメクサ, 野原爪草) Seed: white, virgate trichomes on seed

var. maxima (Weihe) Mert. et W. D. J. Koch (オオツメクサモドキ, 大爪草擬) Seed: larger than var. sativa, 2-3 mm φ var. sativa (Boenn.) Mert. et W.D.J.Koch (オオツメクサ, 大爪草, s.s.) Seed: no hair, 1 mm φ Seeds collected from specimens, shown below, kept in SAPS.

Spergula arvensis in Hokkaido

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var. arvensis (ノハラツメクサ)

1 2 3 4
[1] on Rusutsu Kogen skislope (formerly Daiwa Rusutsu), central Hokkaido, on September 11 1984. [2-4] near a channel in the post-mined peatland of Sarobetsu mire, northern Hokkaido, on August 13 2006, collected by N, K and E.