| Aldwincle Marsh | |
| Aos: | Northamptonshire |
| Interest: | Biological |
| Area: | 2.0 hectares |
| Notifydate: | 1984 |
| Map: | Magic Map |
Aldwincle Marsh is a 2ha biological Site of Special Scientific Interest north of Thrapston in Northamptonshire.[1] [2]
This marsh and fen on shallow peat is formed by seepage from the boundary between clay and limestone. Plants in wet areas include blunt-flowered rush, marsh pennywort, wild angelica and Menyanthes trifoliata, a rare species of bogbean. Drier areas have grasses and herbs which attract butterflies and dragonflies. The site includes a stretch of Harpers Brook.[3]
The site is private land with no public access, but the Nene Way runs along its eastern boundary.