Observation 112496: Parmelia sulcata Taylor

When: 2012-10-06

Collection location: Beaver Co., Pennsylvania, USA [Click for map]

Who: Bob Zuberbuhler (Bob Z)

No specimen available

Found on a wild cherry tree with the foliose lichen pictured in MO112495. This one is grayer, more deeply lobed and black hairy on the underside.

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Recognized by sight
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Eye3 = Observer’s choice
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Add Comment
Rhizines hard to see
By: Jason Hollinger (jason)
2012-10-06 17:01:10 CDT (-0400)

Every source stresses the squarrose rhizines, but your picture is typical — they all sure look simple to me! If you were to scour it very closely (esp. toward the center of the thallus) you would presumably find a few rhizines with short, fine, perpendicular side-branches. The alternative character is a couple rhizines which are forked instead. (That would indicate P. saxatilis or P. barrenoae perhaps, but neither is known from your area, I think.)

Anyway, this is certainly sorediate. P. sulcata is much more common where you are. A little farther south in the Cumberland Plateau and southern Appalachians, P. squarrosa becomes as common or even more common.

Created: 2012-10-06 16:41:00 CDT (-0400)
Last modified: 2012-10-06 16:56:23 CDT (-0400)
Viewed: 26 times, last viewed: 2017-06-14 06:02:35 CDT (-0400)
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