248 
LICHENS OF THE ISLE OF MAN. 
Parmelia olivaeea (L.) Thallus dark or brown olive, shining, slightly 
rough, with small notched lobes, closely appressed, sometimes 
roughened in centre by black soredia; under surface brown and 
covered with root-like rhizinse. Specimens found not in fruit. 
Closely appressed on bark of trees, Ramsey. 
P. physodes var. labrosa (L.). Thallus slaty-grey, in roundish patches; 
lobes notched, imbricate (overlapping, like slates on a roof), inflated* 
on the margins. In this variety the lobes assume a tubular form, 
open at the ends, and fringed by whitish soredia. Not in fruit. On 
trees and pales, Ramsey. 
P. perlata (L.). Thallus glaucous-green, with spreading, roundish lobes on 
the margin, very rough and puckered in the centre; underneath 
brown on the margin, passing into black in the centre. Not in fruit. 
On trees, Sulby Glen. 
P. tiliaeea (Ach.). Thallus bluish-green, smooth, and shining; lobes 
notched and imbricate, appressed, rough in centre ; medulla white, 
tinged red by C. Not in fruit. On trees, Sulby Glen. 
P. fuliglnosa (Dub.). Dark-brown and shining on the margins, blackish, 
and rough in the centre ; lobes notched, imbricate, and closely 
appressed, medulla, C. red. Not in fruit. On stone walls, Glen 
Aldvn, Ramsey. 
P. saxatilis (L.). Thallus glaucous-grey, lobes sinuate and slightly notched, 
surface smooth, shining, and broken into numerous cracks, showing 
the white soredia, sometimes roughened ; beneath black and fibrillose” 
medulla K. yellow, then red. Not in fruit. On trees, Sulby Glen, 
Ramsey. 
P. saxatilis var. furfuracea (Schaer.). Thallus similar to the above, but 
covered by blackish points; coral-like in form, caused by the soredia 
bursting through the thallus to its surface. Amongst moss, North 
Barrule. 
Physeia parietina (L.). Thallus bright yellow, lobes roundish, notched, 
imbricate ; margins thickened and upturned, under-surface white ; 
apothecia waxy, orange-coloured, with entire smooth border; spores 
8, colourless, oblong, with a yellow globule at each end. On trees, 
rocks, walls, &c., Douglas, Ramsey, Peel. This beautiful lichen was 
plentiful everywhere, and abundantly in fruit. Colours brighest in 
the most exposed positions, varying to almost green in shaded situa¬ 
tions, as on gravestones, Kirk Maughold, which would be var. 
polycarpa. 
P. stellaris (L.). Whitish-grey, growing from a central point, starlike 
in form, in long narrow rays, numerous, branching, and interlaced ; 
under surface white, with long root-like fibrillse; apothecia black ; 
spores 8, brown, oblong, 1-septate, cells nucleolate. On stone walls, 
Ramsey. 
P. stellaris var. tenella (Scop.). Similar to type, but lacinise ascending and 
inflated at ends, often bursting and showing soredia in circles at their 
points; margins with white fibrillose cilia. On stone walls, in fruit 
Sulby Glen. 
P. stellaris var. ccesia (Hoffm.). Similar to type, more compact than 
tenella, and scattered over with white powdery soredia. On stone 
walls, in fruit, Sulby Glen. Here these two forms were growing 
amongst P. parietina, their light grey blending with the bright yellow 
of the latter. I have often noticed them growing together in similar 
situations in Scotland. 
P. aquila (Ach.). Light to very dark brown, appressed lacini®, narrow, 
much divided ; under surface paler, with black, root-like fibrillse. On 
rocks on the shore, not in fruit, Peel. 
(To be continued.) 
November, 1898. 
