Possil Marsh

Possil Marsh is a nature reserve and Site of Special Scientific Interest, of both flora and fauna, within the city of Glasgow, Scotland.

The reserve is 31.4 hectares (78 acres) in size, and lies in the catchment of the River Kelvin at 50m above sea level, adjacent to High Possil and Lambhill on the north side of Glasgow.

Within the site there are a number of vegetation communities including Typha latifolia beds, Potentilla palustris meadows and Carex rostrata swamps.

Other species, such as Ranunculus scleratus, entered the marsh due to material being brought in to level up the ground for a cottage that once stood within the reserve.

This has resulted in the loss of species such as Agrostemma githago, Apium inundatum, Armoracia rusticana, Asplenium adainatum-nigrum, Astrantia major, Baldellia ranunculoides, Barbarea verna, Campanula rotundifolia, Ceratophylum demersum, Ceterach Officinarum, Drosera rotundifolia, Gnaphalium sylvaticum, Humulus lupulus, Hypericum humifusum, Lemna gibba, Mimulus luteus, Narthecium ossifragum, Oenanthe crocata, Ophioglossum vulgatum, Parnassia palustris, Pyrola minor, Radiola linoides, Ranunculus ficaria, R. hederaceus, Rorippa amphibia, Sagina nodosa, Sagittaria sagittifolia, Salix repans, Utricularia intermedia, and U. vulgaris, all of which are now believed to be absent.