Sandy coastal heathland, Dorset
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
so this is you taking on Dorset now.
I think this is a good candidate for subsp. uncialis, but as you say, you need to examine the central canal.
An interesting parallel is the fungus Geoglossum arenarium. It has a few other northern localities, but substantially it is a species of the same acid dune systems as C. uncialis subsp. uncialis. It also has one locality in the south - Studland!
I'll be interested to see any further developments.
Looking at this again, with brain switched on and post-coffee, this does look like perfectly good subsp. biuncialis, as Neil has confirmed.
Kicked myself for not getting a specimen but I was out looking for micro-moths and desperately trying not to notice all the Cladonia's! Knew they'd grab a hold of me again though .......
I've got about half a mile of path to search but when I re-find it I'll post further details.
The NBN map shows a site in Hampshire so I might get in touch with Neil Sanderson and see if he can tell me more about possible Dorset / Hampshire distribution for subsp.uncialis.
Curious that Geoglossum arenarium only southern site is also in the Studland area - is this just coincidence or is there some underlying similarity in the dune systems?
I collected and sent a specimen to N Sanderson and it turns out that the NBN record of C. uncialis uncialis is an error.
From his comments on my specimen:
"....not as neat as the sp uncialis I have seen, is actually a bit powdery inside the medulla and is UV + white (sp uncialis is rarely UV + according to the LGBI, which seems a useful definitive character to go on), so probably just tall ssp biuncialis."
Pity. I was mildly hopeful!
Lat/Lng: 50.6, -2.0
OS grid ref: SZ0385