180 
LINDSAY, ON LECIDEA LTJGUBRIS. 
wavy, very slender ; barely equalling in length tlie 
thecse ; tips deep indigo bine. S^wres arranged in 
linear series in tbecse, sub-minute, simple, globose, 
margined ; nucleus pale yellow. Spennogones scattered, 
punctiform, immersed, sub-spberical, simple. Ste- 
rigmata simple, sub-linear; somcAvbat irregular in 
form ; generating from tlieir apices straight, rod- 
like spermatia. 
Syn. Lecidea, sp., Sommf., Suppl. Lapp., 143. 
Schcer., Enum., 101. 
Fries, Lichenographia Europ^a refor- 
mata, 1831, 314. 
Rabenhorst, Die Lichenen Deutschlands, 
1845, 83. 
Schcereria, Korb., Syst. Lich. Germ., 232. 
Hab. On weathered gneissic boulders, moor immediately 
to the west of the village of Braemar, Aberdeenshire. 
Coll. August, 1856. 
Korber mentions, as the habitat of this lichen, primitive 
rocks on high mountains (above 3000 feet of elevation) ; 
stating that it is very rare. He gives only two stations for 
it, — one in the Riesengebirge (Flotow), and the other on the 
Bavarian mountains (Krempelhuber) . Schserer again gives, 
as its habitat, subalpine rocks in Sweden, and other parts of 
northern Europe (Sommf., Blytt, and Flotow). The station 
in which I found it could not be said to be alpine. It was 
the low ground — a moor — immediately to the west of the Free 
Church School-house of Braemar, within half a mile of the 
village, and to the south of the high road leading to the 
Linn of Dee. 
It grew sparingly on some weather-worn gneissic boulders. 
The principal rocks in the neighbourhood are gneiss, granite, 
and mica slate. I did not meet with it at all on the neigh- 
bouring mountains, which include some of the highest in 
Scotland (Ben Mac Dhui, 4296 feet; Brae-riach, 4280; 
Cairntoul, 4230; and Cairngorm, 4050). It is, however, 
a small lichen ; and, not expecting such a rarity, I did not 
specially look for it. I have not hitherto found it in other 
parts of Scotland, notwithstanding that I have visited most 
of its highest mountains in the pursuit of lichenological 
studies (the Cairngorm range, Ben Nevis, Ben Lawers, 
the Coolin Bange, Skye, &c.) It should in future be care- 
fully looked for in such localities as Braemar. 
