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(First upload on April 10 2013. Last on February 15 2025) [ 日本語 | English ]

Youngia japonica (L.) DC.






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

Youngia Cass. (オニタビラコ)
Onitabirako (オニタビラコ, 鬼田平子, s.l.), oriental false hawksbeard
Life form: biennial forb < 1 m in height that is highly variable
Distribution: widespread in East Asia (India - Himalaya - China - Japan - Micronesia - Australia)
Habitat: roadsides, pastures, grasslands, forest edges, etc.
Hair: dense, pubescencet hair on stem and leaf ☛ Lapsanastrum humile (ヤブタビラコ) = hairless
Seed dispersal: wind
Chromosome number: 2n = 16
Synonyms:

Crepis japonica (L.) Benth.

ssp. formosana (Hayata) Kitamura (タカオタビラコ)
ssp. japonica (アオオニタビラコ, s.s.)
ssp. elstonii (Hochr.) Babcock et Stebb. (アカオニタビラコ)
索引

Youngia japonica in Japan


Honshu

ST1 ST2 ST3
ST4 ST4
[1] on the slope of Mount Yatsu, Shizuoka Prefecture, on March 5 2013. [2] in West Ikebukuro Park, Tokyo, on March 14 2017. [3] at a roadside near the Nakasu Street of Kagoshima City, southern Kyushu, on March 18 2015. [4] on a rock wall along a paved road in the Wakayama Experimental Forest of Hokkaido University on June 26 2024. [5] in the Aso Shrine in Aso City, Kyushu, on December 18 2024. Records: on a way to go Abe River near JR Shizuoka Station on March 6 2013. In the Osaka Castle Park (大阪城公園) on February 5 2022.

Hokkaido

ST4 ST5 ST6
ST7 ST8 ST9
[4/5] under an awning at N21/W2, North Ward, Sapporo, on July 11 2011. [6] at the centeral garden of GSEES, HU, on June 20 2013. [7/8] at a lawn near GSEES, HU, on July 14 2014. [9] at a south side of Hokkaido University Main Gate on June 5 2021.Records: at the bottom of Y-kun Crater in the Kompira Craters on Mount Usu on June 26 2021. Along a trail to Mount Moiwa (藻岩山) on June 22 2021.

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