Lathyrus palustris. Marsh pea.

Life-form & Growth Form:

 Hemicryptophyte/geophyte. Herbaceous perennial. Rhizomatous, rhizome far-creeping.  

Flowering period: 

June and July.


Base-rich fens, reed- beds and fen-meadows. Rank marshy vegetation. More rarely found on marshy ground close to rivers. Lowland. 


Habitat loss and fragmentation through drainage of marshy grassland and fen. Overgrazing and excessive poaching by livestock. Historic lowering of Lough Neagh water levels. Under-grazing results in shading out by taller wetland vegetation and wet woodland. Eutrophication results in rank growth which shades out L. palustris

Static distribution map:
Lathyrus palustris
Lathyrus palustris
For an interactive map follow this link to the BSBI webpage