This and my following observations refer to species in the genus Rhizocarpon with yellowish thallus, belonging to the so-called Rhizocarpon geographicum group sensu lato. According to the reference, this group comprises four smaller groups:
R. geographicum group;
R. viridiatrum group;
R. alpicola group;
R. superficiale group.
In general the distiction between these groups are made based on microscopic features. However, the combination of a greenish thallus with strongly convex and big apothecia can only occur in the R. viridiatrum group, to which I believe my specimen belongs.
Growing on siliceous rock.
|I’d Call It That||3.0||0.00||0|
sum(score * weight) /
(total weight + 1)
Created: 2015-08-23 04:15:03 PDT (-0700)
Last modified: 2015-08-23 04:18:19 PDT (-0700)
Viewed: 13 times, last viewed: 2017-06-20 12:27:52 PDT (-0700)