Agaricus urinascens var. excellens
(Formerly Agaricus excellens)A few species appeared this week in the National Botanic Garden.
Most notable of these was this Agaricus growing on the straw bales of the new maze.
It appears to have been "demoted" from a species in it's own right to simply a variety of A. urinascens.
Under the microscope the spores of the two species are identical, however the big difference is the smell. A. urinascens (as the name suggests) smells quite disgusting, whereas var. excellens has that slightly aniseedy smell typical of many Agaricus sp.
As far as I can see there are no records for it here under either name, so a new Welsh record and a first for the Gardens.
Panaeolus papilionaceus var. papilionaceus
When I first saw these in the grass with the remains of the veil hanging off the cap and a stem which snapped as soon as I touched it, I thought they were going to be one of the Brittlestems (Psathyrella).
They are in fact Mottlegills.
It's easy to see how it got it's common name - The Petticoat Mottlegill - with the frilly edges to the cap.
As the cap ages, these drop off making it far less easy to identify.
What is less obvious is the Latin name. Someone must have had an extremely vivid imagination to think it in any way resembled a butterfly!
Hygrocybe ceracea. The Butter Waxcap.
A couple of weeks ago the first of the Waxcaps appeared in the grass close to the Great Glasshouse.
Now a second species - the Butter Waxcap has appeared in the Double Walled Garden.