When: 2015-12-07

Collection location: Monterey Co., California, USA [Click for map]

35.8654°N 120.3047°W 511m [Click for map]

Who: J-Dar

Specimen available

Notes:
On hard shale bedrock outcropping in semi-arid grassland setting.

Barely visible to the naked eye, same color and texture as rock.

Images

Filiform conidia
Cross section of pycnidia

Proposed Names

-28% (1)
Recognized by sight
28% (1)
Recognized by sight
85% (1)
Recognized by sight: Thallus brown, K+R and long conidia

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= Observer’s choice
= Current consensus

Comments

Add Comment
Conidia length
By: J-Dar
2017-02-04 13:39:36 CST (-0500)

I re-examined this specimen. Apothecia are absent. Pycnidia are abundant and aggregated. Conidia are long, filiform, straight to somewhat bent or crooked. Average length is 24.7µm (n=23) with a range of 19.8-30.0µm. The combination of brown K+R thallus and long conidia are pretty diagnostic for Aspicilia cuprea, even without confirming number of spores per ascus, which we will assume are 8.

Pycnidia & Conidia
By: J-Dar
2015-12-15 00:53:50 CST (-0500)

I thought what I was sectioning were immersed apothecia, but I think the micro shows that these are Pycnidia with long filiform conidia. I think the close-up photo (not micro just added) shows multiple pycnidia per areole, with osteoles congregated together appearing somewhat like an elongated and/or branched form, as is described by Nash in the Sonoran Flora. Still need to confirm K reaction on thallus, and measure length of the conidia. Seems like it might be A. cuprea.

Created: 2015-12-09 10:02:02 CST (-0500)
Last modified: 2017-02-04 13:36:38 CST (-0500)
Viewed: 64 times, last viewed: 2019-01-04 10:06:36 CST (-0500)
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