Collection location: Vista House, Multnomah Co., Oregon, USA [Click for map]
Greenish to yellowish crustose lichen found growing on basalt railings and stonework at Vista House.
[admin – Sat Aug 14 02:07:20 +0000 2010]: Changed location name from ‘Vista House, Multnomah County, Oregon’ to ‘Vista House, Multnomah Co., Oregon, USA’
|User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote.|
|I’d Call It That||3.0||6.08||1|
sum(score * weight) /
(total weight + 1)
There are several other granular crustose lichens of the same color. Generally I can make out a few intact lobes in your photo, strongly suggesting Candelaria (even that can be an incorrect deduction), but the one in this photo look purely powdery. Other possibilities are: Chrysothrix (purely powdery or “leprose”), Candelariella efflorescens (only bark, so we can rule it out for this specimen), and Caloplaca (reacts K+ red and is typically oranger).
Created: 2008-10-17 22:44:44 PDT (-0700)
Last modified: 2011-09-22 15:59:32 PDT (-0700)
Viewed: 12 times, last viewed: 2018-07-16 10:03:10 PDT (-0700)