c5cm across. Finding it difficult to compare species
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
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There are only two that this is likely to be. The first is G triplex the Collard Earthstar. In this species the surrounding flesh is so thick that when it opens out it splits around the bulb to leave a little collar. The second is G fimbriatum or Sessile Earthstar.
G vulgatum has a pinkish hue.
It just doesn't look like the other triplex I've seen although I appreciate it can be without the collar. Fimbriatum isn't in Collins!!!
I think it is likely to be G fimbriatum (G sessile) rather than G triplex but I was just being cautious and looking at the cracks starting to appear at the base of the lobes which could lead to a collar being created.
Lat/Lng: 51.0211, -0.7479
OS grid ref: SU879253