Mukdenia rossii (Introduced- UK)

Mukdenia rossii (Oliv.) Koidz., Acta Phytotax. Geobot. 4(2): 120–121 1935. (syn: Aceriphyllum rossii (Oliv.) Engl.; Mukdenia acanthifolia Nakai; Mukdenia rossii f. multiloba (Nakai) W.Lee; Saxifraga rossii Oliv.);
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NE. China to Korea: Korea, Manchuria as per POWO;
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SK 3429 25 April 2022: 4 very high res. images.

Mukdenia sp maybe Mukdenia rossi.
Google search
https://www.flickr.com/search/?user_id=11713966%40N02&sort=date-taken-desc&text=mukdenia&view_all=1

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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  Tropicos  IPNI  Flickr