A biennial or perennial herb of moist places by rivers, ditches, canals and marshes, and a rare casual of waste places. Lowland.
B. stricta was first recorded in Britain in 1843, although it may have previously been confused with B. vulgaris, and it is stable in its distribution.
A Eurosiberian Boreo-temperate species, absent as a native from much of W. Europe.
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