Holme Moor & Clean Moor (grid reference ST095260) is a 10.8 hectare (26.7 acre) biological Site of Special Scientific Interest south of Wiveliscombe in Somerset, notified in 1987. Holme Moor and Clean Moor support a range of habitats associated with high water tables. Swamp and calcareous flush plant communities with a very restricted distribution in Somerset are present. Further diversity is provided by areas of marshygrassland and broadleaved semi-natural woodland. An unusual feature of the ground flora is the abundance of Marsh-marigold (Caltha palustris).