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Photos / Sounds

6656790695_48b6827be0_s

Observer

pete_woods

Date

January 7, 2012 01:00 PM EST

Photos / Sounds

6656790493_4b7378f51f_s

What

Eastern Garter Snake Thamnophis sirtalis ssp. sirtalis

Observer

pete_woods

Date

January 7, 2012 01:00 PM EST

Photos / Sounds

6809921529_ccc692809a_s

Observer

pete_woods

Date

January 14, 2012 12:04 PM EST

Description

This little fungus specializes on this one species of bracket fungus.

Photos / Sounds

6799040259_9e03ae1f97_s

What

Beard Lichens Genus Usnea

Observer

pete_woods

Date

January 26, 2012 01:42 PM EST

Description

Air pollution extirpated this whole genus of lichens from Pennsylvania about a hundred years ago. So why it was growing in Frick Park, in the middle of Pittsburgh, the air pollution capitol of the east, I do not know.

It was growing on an ash tree, attached to the trunk where the trunk was about 3 inches wide. The lichen clump is about 4 inches wide, with the longest branch about 4 inches long. The tree was infested with emerald ash borer, and had been recently cut down.

This may be an isolated waif, or it may be part of a larger population. I still have to do a better search of the immediate area, and of other ash trees around the park, to see if there are any other colonies.

The elastic cord inside each stem clearly identifies this as an Usnea. There are 9 species of this genus historically known from Pennsylvania; I haven't yet figured out which species this is or if any other Usneas have been collected in recent decades.

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