Hymenomycete are a type of fungi. Formerly a taxonomic group of basidiomycetes, now understood as polyphyletic assemblage of basidiomycetes, the term refers to fungi with fruit bodies whose hymenophore develops either not enclosed or only so with a veil (velum), which is called a gymnocarpic or hemiangiocarpic ontogeny, respectively. Puffballs, on the other hand, have gasterocarpic development (hymenophore enclosed).
Hymenomycetes include the vast majority of edible mushrooms, most of which are in the Homobasidiomycetes.
Basidia of Hymenomycetes have various shapes and may be undivided or divided by transverse or longitudinal septa (Fig.
The one unifying morphological feature of the Hymenomycetes is the presence of "dolipore" septa, which are pores in the crosswalls between adjacent cells that are bordered by a collar-like margin of cell wall material (Fig.