Acarospora or Pleopsidium

These are not identified to species and might be in either the genus Acarospora or the genus Pleopsidium.
They are lichens that have been referred to casually as "yellow Acarospora".

Acarospora or Pleopsidium 1
On rock. From Merced Falls, central Sierra Nevada Foothills, California.

Acarospora or Pleopsidium 2
On rock. From Baja California.

Acarospora or Pleopsidium 3
On rock. From Baja California.

Acarospora or Pleopsidium 4
On rock. From the Chiracahua Mountains, southern Arizona.

Acarospora or Pleopsidium 5
On rock. From the Chiracahua Mountains, southern Arizona.

Acarospora or Pleopsidium 6
On rock. From coastal Marin County, north of San Francisco, California.

Acarospora or Pleopsidium 7
On rock. From coastal Marin County, north of San Francisco, California.

Acarospora or Pleopsidium 8
On rock. From coastal Marin County, north of San Francisco, California.

Acarospora or Pleopsidium 9
On rock. From coastal Marin County, north of San Francisco, California.

Acarospora or Pleopsidium 10
On rock. From Ozark National Forest, Arkansas.

Acarospora or Pleopsidium 11
On rock. From Ozark National Forest, Arkansas.

Acarospora or Pleopsidium 12
On rock. From coastal Marin County, north of San Francisco, California.

Acarospora or Pleopsidium 13
On rock. From coastal Marin County, north of San Francisco, California.

Acarospora or Pleopsidium 14
On rock. From along US 395 north of Mono Lake, eastside of Sierra Nevada, California.

Acarospora or Pleopsidium 15
On rock. From Tilden Park, near Berkeley, California.

Acarospora or Pleopsidium 16
On rock. From the Mojave Desert, California.

Acarospora or Pleopsidium 17
On rock. From northeastern California.

Acarospora or Pleopsidium 18
On rock. From Marin County coast, north of San Francisco, California.

Acarospora or Pleopsidium 19
On rock. From Marin County coast, north of San Francisco, California.

Acarospora or Pleopsidium 20
On rock. From Arizona.

Acarospora or Pleopsidium 21
On rock. From the Mojave Desert, near Twentynine Palms, California.

Acarospora or Pleopsidium 22
From Lava Beds Nat'l Monument, California
No specimen; originally designated "Acarospora chlorophana gr."

Acarospora or Pleopsidium 23
From Muir Beach, Marin Co., California
No specimen; originally designated "Acarospora chlorophana gr."

Acarospora or Pleopsidium 24
From Little Lakes Valley, central Sierra Nevada, California

Sharnoff Photos
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