Saxifraga stolonifera Curtis (C and E As.) – An exceptional and ephemeral escape from cultivation. Recorded only once, in 1955, on top of an old wall in Lambermont.
This species is popularly grown as an ornamental but rarely reported as an escape. It is well known from the British Isles, where it is locally naturalized on shady walls and in churchyards (Stace 2010). Further reports are available from e.g. Spain (Campos & Fàbregas 1999).
Selected literature:
Campos M. & Fàbregas E. (1999) Saxifraga stolonifera Meerb. (= S. sarmentosa L.) a La Garrotxa. But. Inst. Catalana Hist. Nat. 67: 60-61. [available online at: http://publicacions.iec.cat/repository/pdf/00000024/00000058.pdf]
Jelitto C.R. (1971) Saxifraga cortusifolia und Saxifraga stolonifera. Palmengarten 35(4): 133-135.
Stace C. (2010) New flora of the British Isles, 3th ed.: XXXII + 1232 p. Cambridge University Press.