Mouse-ear hawkweed

(Upload on November 15 2025) [ 日本語 | English ]

Hieracium pilosella L.

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

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Hieracium L. (ミヤマコウゾリナ)

Haikourintanpopo (ハイコウリンタンポポ, 這紅輪蒲公英), mouse-ear hawkweed
Lifeform: hairy, stoloniferous, perennial forb, developing dense rossette
Distribution: originally in Europe and northern Asia

invasive species in North America

Habitat: dry grasslands and meadows, disturbed areas including pastures and grazed lands, heathlands and dunes
Leaf: ccovered with piloso-hirsute hairs Seed dispersal: wind
Synonyms:

Pilosella officinarum Vaill., when the genus is established

Hieracium alpinum L.

Chishimatanpopo (チシマタンポポ, 千島蒲公英), alpine hawkweed

Japanese name: not a taxonomically recognized species (merely a colloquial or horticultural name)
Chishima = Kuril (but the name, not related to Kuril at all)

Lifeform: perennial forb, developing rossette with 10-25 cm tall
Distribution: originally in European Alps (with 2000-3000 m elevation)
Habitat: originally in alpine and subalpine meadows,arctic tundra, open grasslands and slopes
Leaf: ccovered with piloso-hirsute hairs Seed dispersal: wind

Synonyms:

Hieracium alpinum var. foliosum Gaudin (homotypic)
Hieracium bellidifolium Froel. (heterotypic)
Hieracium halleri var. longistylum Bamb. (heterotypic)

Hieracium pilosella in Hokkaido

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[1-6] in a frontyard of Bansei Spa, Taiki Town, central-southern Hokkaido. [1-5] on June 23. [6] on June 24 2025.