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(First upload on July 15 2010. Last on April 29 2019) [ 日本語 | English ]

Cardamine L. (タネツケバナ) Michtanetsukebana (ミチタネツケバナ, 路種漬花), hairy bittercress Lifeform: winter annual in temperate regions, or biennial in cool regions (controversial) Distribution: Europe - Asia (exotic to Japan) Habitat: developing colonies at roadsides, lawns and gardens (dry and sunny sites) Chromosome number: 2n = 16 (32, or 64 - doubtful) Synonyms: Cardamine hirsuta L. var. formosana Hayata

Ghinia hirsuta (L.) Bubani Annotation C. scutata (タネツケバナ), native _______ larger (≈ 15-30 cm in height) than the two exotic species shown below, rosette blights when fruiting, wetter sites, six stamens in a flower The following two species are exotic to Japan C. hirsuta L. (ミチタネツケバナ) ________ hairless leaf, rosette remains when fruiting, four stamens in a flower C. debilis D. Don (コタネツケバナ) ______ rosette blights when fruiting

Cardamine hirsuta in Japan

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Hokkaido

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4 5 6
[1] an flowering shoot at N14/E3, East Ward, Sapporo, on May 11 2010. [2] at N25/W3, North Ward, Sapporo, on May 19 2011. [3] flowers at a roadside, N17/E1, East Ward, Sapporo, on April 30 2012. [4] at a roadside, N21/W3, North Ward, on May 9 2013. [5] at a roadside, N14/W5, North Ward, on April 17 2914. [6] under a street tree near JR Toya Station, southern Hokkaido, on June 6 2013. Records: in a northern part of HU on May 3 2019. Flowering at a flower bed under a street tree in N23/W2, North Ward, Sapporo, on April 28 2021. Flowering along a paved road in front of JR Toya Station on April 25 2022. Flowering in Shell Plaza Road Station, southern Hokkaido, on April 20 2023.

Honshu

1 2 3
4 5
[1] around Aoba Castle, Tohoku District, Honshu, on March 22 2016. [2/3] in the Koishikawa Botanical Garden (小石川植物園), the University of Tokyo, on March 16 2017. [4/5] in Arima Onsen (Spa), Kobe City, western Japan, on March 17 2019.