Observation 186910: Cladonia coniocraea (Flk.) Spreng.
When: 2014-11-01
Who: zaca
No herbarium specimen

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In fact …
By: zaca
2014-11-28 13:11:16 PST (-0800)

I didn’t consider, as probably I should, C. ochrochlora. Thanks, Jason, for the warning.

Tricky pair of species
By: Jason Hollinger (jason)
2014-11-27 09:23:30 PST (-0800)

I’m sure you’re right… but several podetia display conspicuous corticate sheath in lower half(!) Do you see this commonly? My understanding of the difference between C. coniocraea and C. ochrochlora is (based on notes from T. Goward, whose concept agrees with T. Ahti’s):

C. coniocraea C. ochrochlora
podetia corticate at most in bottom 20% podetia corticate in lower 20-50%
abrupt transition from cortex to soredia soredia often in distinct patches in lower half of podetia
podetia narrow (< 2 mm) podetia thick (to > 2 mm)
squamules often sorediate squamules rarely sorediate
squamules usually divided and “tattered” squamules with even margins or weakly divided

But this set of distinctions doesn’t seem to apply equally well across the species’ entire geographic ranges.

Yours would seem to match C. coniocraea very well (as you say) except for the one character: the extent of the basal sheath of cortex.

Created: 2014-11-01 13:08:47 PDT (-0700)
Last modified: 2014-11-01 13:08:57 PDT (-0700)
Viewed: 29 times, last viewed: 2016-09-05 08:31:40 PDT (-0700)
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