*1: Rosewall Hill, St
Ives, 1923, HHK (BM) (Paton 1969a:
*2: Peaty soil on old
wall S. of Hawk's Tor, Bodmin Moor near North Hill, 1966, JD
(Paton 1967b: 398, 1969a: 697).
Habitat notes from C&S are as follows.
Watchtor: on steep to vertical peaty and gritty soil of low
banks on N.-facing heathy hillside, including old mine areas,
slightly shaded. On thin soil over granitic rocks on Carn
Galver, unshaded to part shaded (with Lophozia ventricosa).
On Isles of Scilly on peaty soil, unshaded or almost so, on
cliff tops, coastal slopes and coastal heath, sometimes among
Gemmae always present. Not seen