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On bare and open sites, usually with a basic substrate. The plant was found to be much more abundant in the city than had been anticipated and, in some parts of the town, is one of the dominant taxa of bare sites. Crackles (1990) records it for the dock areas east of the River Hull only. Almost certainly increasing.
J F Robinson 1902: "Near Willerby."
Herbarium material: HLU : Willerby chalk pit 1934 {A K Wilson}; Willerby {R Good}. HLL : Willerby 1933 {A K Wilson}. HUM : Willerby chalk pit 1889 {J R Waller}.
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