|
|
|
|
|
49.
Leptogium saturninum [lead-colored; while the God Saturn is usually
linked with gold, he is sometimes also associated with
lead!]. |
|
|
|
|
|
|
|
|
A black,
thin and softly foliose lichen characteristically found on seeping
walls of vertical cliffs. The algal host is a blue-green alga,
Nostoc (now more correctly called a cyanophilic bacterium).
The underside is covered by white rhizinae. Foliose black lichens
on wet rocks usually belong to either Leptogium or
Collema. |
|
|
|
|
|
|
|
|
50.
Pseudephebe (Parmelia) minuscula [tiny]. |
|
|
|
|
|
|
|
|
An
intensely black lichen composed of narrow, elongate, overlapping
branches that are irregularly swollen and becoming almost
threadlike at the tips, common on rocks of the alpine tundra. A
second species, P. pubescens, is similar but the branches
are much more slender and lack the irregular swellings. |
|
|
|
|
