I am compiling a list of taxa capable of colonizing smooth surfaces for personal research reasons.
Note that my definition of “smooth” here includes smooth paint/glass/broadleaf angiosperm leaves/plastic/metal but excludes smooth concrete/brick/bark/rock and rough paint/glass/plastic/metal. Concrete/bark and the like are highly porous and have a very rough microtexture even when relatively smooth.
Here is my list so far:
Candelaria concolor
Xanthoria parietina
Polycauliona polycarpa
Diploicia canescens
Physcia adscendens, dubia, probably others Parmelia perlata, sulcata
Hyperphyscia adglutinata
At least some Xanthoparmelia spp.
I would greatly appreciate it if anyone would be able to add to said list!
Update: found this, which mentions one species of Candelariella and several macrolichens being “accidentally” (killed by leaf-fall before reproductively maturing) foliicolous. Not sure whether said macrolichens were growing on smooth or rough leaves though, because it did not mention which tree species they were on, but perhaps one of you might still find it useful.