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Fairly frequently encountered, particularly on railway ballast. Some plants seen may be garden escapes.
J F Robinson 1902: "On the old remains of Haltemprice Abbey, near Cottingham, Oct., 1898. Also an alien hybrid at the Hull docks."
Herbarium material: HLU : Willerby 1933 {A K Wilson}; Hessle 1947 {A K Wilson}. HLL : Willerby 1934 {A K Wilson}.
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