wanderflechten's photostream  

in different locations all using same color temperature and similar ambient light

top 2 were on rock near salt water

bottom 2 on ornamental trees in West Seattle (probably more shaded in summer)

an invasive species that appears to be spreading rapidly here

on mossy rock, vicinity of Deception Pass, WA

The fungus (P. britannica) and the green alga (Coccomyxa) combine to form this lichen's green (particularly so when wet) lobes, which are speckled with dark "cephalodia" containing the cyanobacterium (Nostoc). In this "individual" cephalodia have escaped and formed the purplish lobes, which in turn are sprouting pure green lobes. So we have two versions (photomorphs) of the same lichen.

on cement pagoda, Seattle

on Si rock 30m elev
vicinity of Deception Pass

top - near Deception Pass

bottom - near La Push, a much wetter place; this form easy to mistake for Alectoria

also see www.flickr.com/photos/29750062@N06/3600749335/in/photostr... where the more Alectoria-like form still has some netted portions