Diphasiastrum alpinum. Alpine clubmoss.

Life-form & Growth Form:  

Chamaephyte. Semi-woody perennial. Rhizome far-creeping. 

Flowering period: 

July & August. 

Habitats: 

Short acidic grassland on mountain summits. Moist, well-drained, thin-peaty soils, overlying rocks. Rarely acidic sands. 

Threats:

Excessive sheep grazing limits sexual reproduction as the erect, spore-producing strobili are often eaten. Peat erosion and poaching of the sward is caused by excessive localised livestock trampling and excessive footfall by visiting hikers. Spatial separation of each population cluster from creates greater risk of local extinction(s). Over time, climate change may cause more competitive temperate species to invade montane swards and shade Arctic-alpines such as D. alpinum.  

Static distribution map:
Diphasiastrum alpinum
Diphasiastrum alpinum

For an interactive map follow this link to the BSBI webpage