Hebeloma gigaspermum is a European species of mushroom in the family Hymenogastraceae.
The species Hebeloma gigaspermum was first described only in 1981 and is externally similar to the much better-known Hebeloma sacchariolens (being placed in subsection Sacchariolentia of the genus). It is not uncommon in Northern Europe and until 1981 examples were probably simply considered to be H. sacchariolens.
The name gigaspermum means "giant-spored".
It is a nondescript clay brown or ochre mushroom with somewhat viscid cap, up to about 5cm (02inches) in diameter, and has a strong sweet odour which has been likened to orange blossom or amyl acetate.
It is similar to H. sacchariolens, and according to one source can be distinguished by
As Hebeloma contains poisonous species, H. sacchariolens is not to be recommended for culinary use.