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(Upload on November 8 2023) [ 日本語 | English ]

Bidens L. (センダングサ) Yanagitaukogi (ヤナギタウコギ, 柳田五加木), nodding beggar-ticks or nodding bur-marigold Lifeform: annual forb with 50-100 cm in height Distribution: widespread in the cool temperate regions of Northern Hemisphere, including Japan (north to Aomori Prefecture) RDB: CR in Japan and EN in Hokkaido

Habitat: wetlands, including paddy fields Seed dispersal: animal (external) by hooked barbs Chromosome number: 2n = 24 or 48 Synonyms: Bidens cernua L. var. limosa Nakai

Bidens cernua in Hokkaido

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[1-3] within a paddy field in the first agricultural farm of Hokkaido University on August 25 2023.