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(First upload on September 20 2007. Last on August 15 2021) [ 日本語 | English ]

Arctium L. (ゴボウ) Biennial thistles → one species is distributed in Japan Gobo(u) (ゴボウ, 牛蒡), great burdock Noragobo (ノラゴボウ, 野良牛蒡) Lifeform: biennial/perennial forb Distribution: native to the Mediterranean and West Asia (immigrated to Japan in the Jomon Era) Habitat: wastelands, arablelands, grasslands, etc. Seed dispersal: animal (ecto-zoochore) Can be seen at HUSTEP (flora list) Vegetable: roots (many cultivars) in Japan

Chromosome number: 2n = 18, 34 or 36 Seed germination: Deep seed dormancy, due to post-ripening occasionally for more than three months containing the inhibitor of seed germinaiton in the seed coat germination improved by soaking the seeds in water overnight, because the inhibitor is reduced Light: required Temperatre: optimal at 22°C

Arctium lappa in Hokkaido University Campus

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[1] going to a grocery to see the belowground organ that is edible on September 19 2007. I do not like to touch the flowers and fruits, because I do not like to disperse the adhisive seeds. [2] seedlings at the backyard of GSEES, HU, on May 13 2021. [3] in a court used for a smoking area in GSEES, HU, on July 30 2021. [4-6] near the training hall of Japanese archery, Hokkaido University. [4] on July 19 2016. [5] a huge shoot on June 21 2017. [6] on July 20 2017. [7] in a court used for a smoking area in GSEES, HU, on January 13 2021.