(First upload on Nov. 18 2008. Last on July 12 2013) [ 日本語 | English ]

Chelidonium majus L.

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

Chelidonium Tourn. ex L. (クサノオウ)
One species (controversial)
C. majus L.
Kusano-ou (クサノオウ, 草ノ黄/草ノ王/瘡ノ王), s.l., greater celandine
Lifeform: annual forb
Seed dispersal: myrmecochory (ant dispersal) by producing elaiosome
Poison: yellow latex sap
ssp. asiaticum H. Hara
kusano-ou (クサノオウ, s.s.)
Distribution: Eurasia
Habitat: grassland - forest edge

HUSTEP: Plants and Plant communities in Japan (flora list)

Chromosome number: 2n = 10 or 12

Chelidonium majus L. var. asiaticum (H. Hara) Ohwi ex W. T. Lee
Chelidonium majus L. var. hirsutum Trautv. et C. A. Mey.
Chelidonium asiaticum (H. Hara) Krahulc.

ssp. majus
Common name: ヨウシュクサノオウ
Distribution: Europe - West Asia

Chelidonium majus in Hokkaido


[1-2] at a way to go Abuta Shrine, southern Hokkaido, on June 6 2013. [3] at Yachidamo Park (Yachidamo = Fraxinus mandshurica), N28E4, East Ward, Sapporo, on May 31 2011. [4] Frutis seen in Hokkaido University Campus on June 22 2011. The seeds with elaiosome are contained in the fruits. Records: In Hokkaido University Campus on July 18 1998. At a forest edge close to Keiteki-no-mori Forest (恵迪の森) on May 21 2009)