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(First upload on October 4 2015. Last on January 20 2017) [ 日本語 | English ]

Ageratum L. (カッコウアザミ) Ookakkouazami (オオカッコウアザミ, 大霍香薊), blue billy goat weed Murasakikakkouazami (ムラサキカッコウアザミ, 紫霍香薊) Lifeform: semi-cold tolerant perennial forb, treated as annual in Japan Distribution: Central America and areas close to Mexico, now widespread in the world Habitat: grasslands, openlands, etc. Flower: basically pale bule (white - pink - violet)

Use: gardening, escaped in the southern regions of Japan var. angustatum B. L. Rob. var. muticescens B. L. Rob. var. typicum B. L. Rob. f. isochroum (B. L. Rob.) M. F. Johnson f. luteum f. niveum B. L. Rob. f. normale B. L. Rob. f. versicolor B. L. Rob.

Ageratum houstonianum in Hokkaido

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[1] under a street tree on N23/W3, North Ward, Sapporo. [1] on September 7 2015. [2-4] on September 9 2017.