A perennial herb of damp or wet neutral or calcareous soils, and of more acidic soils where these are flushed by mineral-enriched groundwater. Habitats include short-sedge mires, damp meadows and pastures, fen-meadows, wet heaths, flushes and springs, montane rock ledges and Dryas heath. It also occurs, albeit rarely, on N.-facing slopes in chalk and limestone districts. 0-915 m (Macgillycuddy`s Reeks, S. Kerry, and W. Ross).
A perennial herb of sheltered rock ledges and clefts on sea-cliffs, invariably in seepage zones where freshwater trickles down the cliff-face. It is also found on wet sandy patches in saltmarshes, and amongst rocks or on sand where streams debouch onto the shore. It occurs in similar habitats to C. distans, and may sometimes be mistaken for it. Lowland.
A perennial herb of wet, base-poor peaty substrates, mainly occurring in flush-bogs on gentle slopes, often in areas of late snow-lie or by streams flowing from them. It also occurs by pools, and on terraces by the side of incised burns. From 790 m in Drumochter Forest (Westerness) to 1125 m at Lochan Bhuidhe and Ben Macdui (both Banffs.).
A rhizomatous perennial found in marshes along the lower reaches and estuaries of the Wick River (Caithness), the River Beauly and the Kyle of Sutherland (both E. Ross), growing in places where silt is periodically deposited or where the water-table fluctuates. It sets few viable seeds and reproduction is mostly vegetative. Lowland.
A tufted perennial herb of damp woodland and woodland rides, often growing in considerable shade. It can become dominant in favoured habitats, such as in woods that are seasonally flooded. Generally lowland, but reaching 320 m in Swaledale (N.W. Yorks.).
This rhizomatous perennial is found in reed-swamps, on the edges of pools and lakes, in marshy areas and wet woodland, and along the banks of slow-flowing rivers and canals. It is a species of base-rich, mesotrophic or eutrophic sites. Reproduction is mainly vegetative, but new colonies can arise from seed. Lowland.
A rhizomatous perennial herb found in emergent stands on the edges of lakes and ponds, rivers and streams, in ditches, swamps, fens and bog pools, wet meadows, flush-bogs on hillsides, sea-cliff flushes, wet dune-slacks, and Alder and Salix carr. It usually grows in oligotrophic or mesotrophic, acidic waters, though it also occurs in nutrient-poor calcareous conditions. 0?1040 m (Creag Meagaidh, Westerness).
A plant of wet, marshy areas, especially by streams and lakes, often with both parents. It is, however, present in Shetland in the apparent absence of C. vesicaria. It is highly sterile, but may spread to form large stands. Generally lowland, but upper altitudinal limit unknown.
A perennial herb of basic substrates on cliff ledges and crevices, and on broken rocky or grassy slopes, always over base-rich rocks. It is often a shy flowerer, and it sometimes grows with C. pulicaris with which it can be easily confused. Found near sea level in N.W. Scotland, but usually from 600 m, to 935 m on Ben Lawers (Mid Perth).
This rhizomatous perennial herb is usually, but not exclusively, found on base-rich substrates, in areas where there is little water movement. It occurs on flat mountain tops and gentle slopes, and in damp flushes and hollows where snow lies late. From 460 m in Glen Clunie (S. Aberdeen) to 1125 m on Ben Lawers (Mid Perth).