Easily mis-identified as : other Pansies such as Wild Pansy (Viola tricolor).

Hybridizes with :

• Wild Pansy (Viola tricolor) found in Derbyshire and South Northumberland only but are difficult to identify. Their appearance is closer to that of Mountain Pansy.
• Field Pansy (Viola arvensis) possibly grows in NW Yorkshire and Roxburghs with much smaller yellow flowers than Mountain Pansy but larger than those of Field Pansy.

Mountain Pansy is a native, perennial flower which spreads by slender rhizomes. The pollen grains usually have four pores, but a microscope is needed to see them. It grows in upland grassland pastures, rocky places preferring limey soils or heavy metalliferous soils such as ultramafic (serpentinic) or calamine soils, growing up to 1050m above sea level. However, it seems that they are not Metallophytes, but rather excluders of heavy metals in the soils. Those Mountain Volets which do grow in calamine soils should be treated as Viola lutea ssp. calaminaria.