Collection location: Lost Cabin Trail, Black Hills, Pennington Co., South Dakota, USA [Click for map]
43.881° -103.551° 1675m
HABITAT forested outcrops on south/east slopes; SUBSTRATE thin moss over siliceous outcrop in forest; ASPECT shaded.
|User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote.|
|I’d Call It That||3.0||6.42||1||(jason)|
sum(score * weight) /
(total weight + 1)
The situation here is more or less as follows:
D. scruposus exists almost everywhere, it has a wide distrubution and I found it in every of the big locations where I’m used to observe lichens. All the others that I have encontered have big populations but only locally; out of there it is very hard to find them. This is the case of D. diacapsis, where the big populations are found on soil close the the sea, and of D. actinostomus, living on man made rock structures.
On the other hand, it is very difficult to find a specimen where one can count the number of spores per ascus. I think this is why on the literature and on websites one find D. scruposus either having 4 spores or 8 spores per ascus, rarely you find (4-)8 or 4(-8).
Not obviously associated with Cladonia. I collected a whole bunch of Diploschistes during this trip, trying to find something other than D. muscorum. But now when I look at the specimens, I’m finding all of them, even the ones apparently unassociated with Cladonia, to have:
consistently 4-spored asci
hymenium < 100µm
I confess that I’ve been ignoring chemistry. Here’s the data I’ve compiled from multiple sources. Does this match your experience at all? I note that there’s precious little to distinguish three species reliably. :(
|K+/C+?||hymenium||spore number||spore length||number of longitudinal septae||pruina|
|D. muscorum||always||80-120µm||always 4||18-32µm||1-2||sometimes|
|D. diacapsis||always||110-180µm||4 to 8||20-38µm||1-2||sometimes|
|D. scruposus||sometimes||90-130µm||4 to 8||25-40µm||2-3||never|
Created: 2012-07-17 14:03:45 CDT (-0400)
Last modified: 2015-09-27 19:02:54 CDT (-0400)
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