Rather infrequent, usually near to the garden parents and in some cases may be deliberate introductions.
J F Robinson 1902: "Near Cottingham."
Herbarium material: HLU : Dunswell 1952 {D A Wilkins}. HLL : Springhead 1932 {A K Wilson}. HUM : Cottingham Road, Hull 1890 {J R Waller}.
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