COLOLEJEUNEA 305 
COLOLEJEUNEA (Spruce) Schiffn. 
COLOLEJEUNEA MINUTISSIMA (Sim.) Schiffin. 
This is one of the rarest of the group in Scotland, and 
has only been found near the shore on the west coast, 
nearly always on tree stems. It forms small pale-green 
patches unmixed with other species, and can be generally 
recognised by the constant presence of perianths; fruit has 
not been found on our specimens, but gemmz are common. 
W. HicgHianps.—W. Inverness: Moidart, on old yew 
trees and on a rock at sea-shore, per., 1898 (Macv.). 
INNER HeEsBRIDES— Wid Inner Hebrides: Nr. Tober- 
mory, on ash trees, per. (Macv.). 
COLOLEJEUNEA MIcROscoPIcA (Tayl.) Schiffn. 
The commonest of the small species of the group, being 
found in most of the low-lying, sheltered ravines of the 
western part of the Highlands which have been searched, 
also occurring on moist, sheltered rocks near the sea-shore ; 
is very rare on the hills, but has been found up to 1700 ft. 
alt. Although confined to the west side of the country, it 
goes slightly over the watershed into the Eastern Highlands 
where the boundary is not distant from the west coast. In 
the West Lowlands this species is very rare and has only 
been found in one of the wetter districts. Its range at 
present known is from Kirkcudbright to West Ross. It 
will no doubt be found over all the west coast of the 
Highlands, though it does not appear to be present on the 
north coast, nor has it been found in Orkney. If it be 
really absent from Shetland, it can only be from the want 
of suitable localities, as it extends north to the Faroe 
Islands. 
This species is almost entirely confined to rocks, but has 
been found on birch-trees. It is most common on schistose 
rocks, but occurs on gneissic formations and on granite, 
basalt, and limestone. It usually grows unmixed when 
directly on the rock, but when on Metzgeria, Frullania, 
ete., it is generally accompanied by other members of the 
group. Forms very pale green, thin patches or separate 
TRANS. BOT. SOC. EDIN. VOL. XXV. 20 
