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Bidens tripartita L.






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

Bidens L. (センダングサ)
Taukogi (タウコギ, 田五加木), three-lobed beggarticks, leafy-bracted beggarticks, etc.
Lifeform: annual forb, with 30-100 m tall

weed for paddy field

Distribution: most regions in the Northern Hemisphere, including Japan
Habitat: mesic sites, such as paddy fields
Stem: no hair
Seed dispersal: animal (external) by hooked barbs
Chromosome number: 2n = 48
Synonyms:

Bidens acuta (Wiegand) Britton
Bidens comosa (A. Gray) Wiegand

ssp. bullatus (L.) Rouy
ssp. tripartita, (or var. tripartita) the type
var. repens (D. Don) Sherff (ハイタウコギ)
索引

Bidens tripartita in Japan


ST1 ST2 ST3
[1-3] along a paved road near Muroran Marine Station, Muroran City, on September 12 2016.

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