Hebeloma gigaspermum is a European species of mushroom in the family Hymenogastraceae.
Taxonomy The species Hebeloma gigaspermum was first described only in 1981 and is very similar to the more well 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".
Description It is an undistinguished clay brown or ochre mushroom with somewhat viscid cap, up to about in diameter, and has a strong sweet odour which has been likened to orange blossom or amyl acetate.
Similar species It is similar to H. sacchariolens, and according to one source can be distinguished by
its ecology with willow and alder in boggy ground (as opposed to forests and gardens with broad-leaved trees in general), and its large spore size of 13–17 × 7–9 μm (as opposed to 11–14 × 6–8 μm).
As Hebeloma contains poisonous species, H. sacchariolens is not to be recommended for culinary use.
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