Rodgersia podophylla A. Gray (China, Japan, Korea) – An exceptional escape from cultivation. A subspontaneous individual was seen in 2016 in Vrijbroekpark in Mechelen, where it is also cultivated.
This species is slightly more frequent as an escape in Europe than R. aesculifolia. It is known from the British Isles (Clement & Foster 1994, Stace 2010), Scandinavia (Karlsson 1997), Ireland (Reynolds 2002) and, more recently, two localities were discovered in Germany as well (Fuchs & al. 2008).
Rodgersia podophylla differs from R. aesculifolia in leaflets that are 3(-5) lobed at apex.
Selected literature:
Clement E.J. & Foster M.C. (1994) Alien plants of the British Isles. BSBI, London: XVIII + 590 p.
Fuchs R., Adolphi K., Sumser H., Kordges T. & Gausmann P. (2008) Verwilderte Vorkommen von Rodgersia aesculifolia Batalin und Rodgersia podophylla A. Gray (Saxifragaceae) in Nordrhein-Westfalen. Flor. Rundbr. 41: 7-14. [available online at: https://www.researchgate.net/publication/313920515_Verwilderte_Vorkommen...
Karlsson T. (1997) Förteckning över svenska kärlväxter. Svensk Bot. Tidskr. 91: 241-560.
Reynolds S.C.P. (2002) A catalogue of alien plants in Ireland. National Botanic Garden Occasional Papers 14.
Stace C. (2010) New flora of the British Isles, 3th ed.: XXXII + 1232 p. Cambridge University Press.
Takahashi H. (2001) New localities of Rodgersia podophylla A. Gray in Hokkaido (in Japanese). Bunrui 1(1-2): 61-62.