E-Flora BC Photo Gallery


Placopsis gelida  (Common bullseye)

Photo of Placopsis gelida by Daryl Thompson
© Daryl Thompson (Photo ID #22302)

Photographer's Submitted Details

Photo Location Near Tofino BC Photographer Daryl Thompson
Habitat On exposed granitic outcrop  
Photo Date November 04, 2007 Upload Date November 21, 2010
Elevation (m)  
UTM Zone # Latitude
UTM Easting Longitude
UTM Northing Photo ID # 22302
Notes The large pink structures centered in the larger pale thallus are not apothecia but cephalodia contain nitrogen fixing cyanobacteria (the primary photobiont is green algae). It is thought they provide essential nitrogen for a young thallus to establish on the fresh surfaces of granite where they are often found. The powdery green balls are sorelia, containing fragments of green algae and fungal hyphae which provide an asexual (vegetative) method of reproduction.


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