Observation 86110: Acarospora socialis H. Magn.
When: 2011-12-27
(32.0° 112.0° )
No herbarium specimen

Notes: Locality: Diablo Wash, Ajo Mountains, Organ Pipe Cactus National Monument, Pima Co., Arizona, USA; 32° 0’36.63"N, 112°43’53.46"W, el. 695 m

Substrate and habitat: Growing on rough talus boulders in cactus and thorn scrub desert on the lower slopes of the Ajo Mountains.

Identification: See MO Observation 86108 for notes on yellow Acarospora in Pima County, Arizona.

The three habitat photos show yellow Acarospora on rhyolite cliffs on the higher slopes of the Ajo Mountains, in Arches Canyon, 3 km NE of Diablo Wash.

Species Lists


yellow Acarospora on rhyolite cliffs in Arches Canyon
yellow Acarospora on rhyolite cliffs in Arches Canyon
yellow Acarospora on rhyolite cliffs in Arches Canyon

Proposed Names

28% (1)
Recognized by sight
56% (1)
Eye3 Eyes3
Used references: Knudsen in Nash et al., Lichen Flora of the Greater Sonoran Desert, Vol. 3" (2007, pp. 1-38)

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
This could be A. socialis
By: Jason Hollinger (jason)
2012-01-11 03:06:29 CST (-0600)

I’ve seen it white-pruinose like this before. All but the third photo (194813) are easily sufficiently “subsquamulose” to fit the bill.

Created: 2012-01-10 22:57:11 CST (-0600)
Last modified: 2012-01-12 11:20:15 CST (-0600)
Viewed: 69 times, last viewed: 2017-06-18 18:28:38 CDT (-0500)
Show Log