An apomictic perennial herb, now restricted to a single locality (Plémont Point, Jersey) where it grows in rock crevices on the side of a bare granite gully. It used to occur at a second site on Jersey (Rouge Nez), on nearly inaccessible cliffs. Lowland.
A mat-forming perennial herb of the upper parts of saltmarshes and saltmarsh-sand dune transitions, especially where firm sandy or silty sediments overlie coarser grained material. Lowland.
A group of apomictic perennial herbs comprising the following nine species and numerous infraspecific taxa, many of which are British and Irish endemics. They occur in a wide range of coastal habitats including sea-cliffs, dock walls, shingle banks and saltmarshes. Lowland.
This subspecies occurs in the drier parts of saltmarshes and tidally-inundated dune-slacks, often where blown sand and inwashed silt overlie a firm shingly base. There is also a single record from a stabilised earth cliff. Lowland.
A perennial herb which is almost entirely restricted to chalk sea-cliffs with a few tiny colonies on adjoining shingle and the drier parts of saltmarshes. Lowland.
A perennial herb found on chalk sea-cliffs and in the drier parts of saltmarshes. Lowland.
A perennial herb which is restricted to coastal rocks and nearby cliffs of Quaternary head deposits (unconsolidated sand and rock fragments) at Lannacombe (S. Devon). Lowland.
A perennial herb found amongst coastal rocks and screes and on sea-cliffs. Lowland.
A perennial herb restricted to dry saltmarsh and saltmarsh-sand dune transitions, particularly favouring sites where blown sand and inwashed silt overlie shingle. Lowland.
A perennial herb of coastal rocks and sea-cliffs. Lowland.