Ditrichum cornubicum, commonly known as the Cornish path-moss,[2] is a moss endemic to Cornwall, United Kingdom.

[3] It has not been re-found at Lanner but two years later, in 1965 she found the same species at a disused copper mine on the south-east edge of Bodmin Moor at Minions.

[4] A small population discovered in west Cork, Ireland is likely to have been an accidental introduction from Cornwall and appears to have disappeared.

[6] The moss is intolerant of competition from other plants and grows on compacted, sparsely vegetated ground, usually on or besides old paths, along tracks, occasionally on banks, as well as the crevices of old walls.

As the metals slowly leach out of the soil by weathering, other mosses can colonise and out-compete D cornubicum.