Observation 11946: Cladonia hammeri Ahti
When: 2008-10-04
Herbarium specimen reported

Notes: This is abundant on sunny exposed mossy banks along trails and roadcuts throughout the foothills around the San Gabriel Valley. I’m fairly confident that it must be Cladonia hammeri, a species newly described in Nash’s Sonoran Flora. The distinguishing characteristics seem to be:

CUPS: broad, on short podetia, completely decorticate, covered with corticate granules and schizidia both on the podetia and inside the cups, esorediate
SQUAMULES: esorediate, pale grayish, strongly curled up in dry weather exposing the pure white cottony undersides

They have a rather whitish, granular overall appearance — much more so than other Cladonia, such as C. pyxidata (at least partly areolate-corticate), C. chlorophaea, C. asahinae (more finely powdery or granular).

According to Ahti and Hammer (who did the treatment for Cladonia in Nash’s flora), this is explicitly common in southern California.

Images

23836
23821
Conspicuously decorticate podetia, seen from side, at 10×.
23822
Granules/schizidia inside cup, seen from above, at 10×.
23835

Proposed Names

92% (2)
Eye3 Eyes3
Used references: Nash’s Sonoran Flora

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
No one has commented yet.

Created: 2008-10-04 11:49:04 PDT (-0700)
Last modified: 2008-10-04 11:49:04 PDT (-0700)
Viewed: 119 times, last viewed: 2016-03-20 17:00:23 PDT (-0700)