When: 2009-03-10

Collection location: Perry Co., Tennessee, USA [Click for map]

Who: NismoC

No specimen available

neon, bright color is what grabbed my attention. texture felt as if it was part of the wood itself (see pics)

does anyone know what this is exactly?

fungi? moss?

[admin – Sat Aug 14 02:04:33 +0000 2010]: Changed location name from ‘Perry County, TN’ to ‘Perry Co., Tennessee, USA’

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By: NismoC
2009-04-02 15:17:39 CDT (-0400)

thank you.

Neither — it’s a lichen!
By: Jason Hollinger (jason)
2009-04-02 14:23:38 CDT (-0400)

This is very common on the sheltered side of old weathered fenceposts. Also can find it in massive quantities on trunks of big deciduous trees in oldgrowth forests (eg. cottonwoods, oaks). There are loads of good images on google image search. You can identify it — to the extent that anyone can — by its absolute and total lack of any useful identifying features: it is simply a patch of extremely fine powdery gold soredia. (All spot tests negative, pigment is calycin and/or pinastric acid.) Apparently some patient soul has managed to find a fruiting body on it somewhere because in “Lichens of N. Amer.” it is listed as the only genus in Chrysothricaceae under order Arthoniales. There are several other species, but none as common(?)