Carex viridula subsp. oedocarpa
This perennial grows on wet ground on soils ranging from acidic to neutral or occasionally mildly alkaline. It is found in a wide variety of open habitats, including sandy shores, tracks, streamsides, wet fields and heathland, the margins of ponds and lakes, wet rocky hillsides, flushes and seepage areas. 0?930 m (Beinn Heasgarnich, Mid Perth).
This, the most widespread of the C. viridula subspecies, was mapped as `all records` in the 1962 Atlas. It is now much better recorded but it has declined at the edges of its range in S. England, and in the English and Irish Midlands, almost certainly due to drainage and habitat loss.
Suboceanic Boreo-temperate element; also in eastern N. America.