The basidiumbasidium The basidium (pl. basidia) is a cell on which the sexual spores (basidiospores) of basidiomycetes are produced. Usually it is club-shaped, there are four basidiospores on pegs called sterigmata (sing. sterigma), and the spores are forcibly popped off a short distance. In some groups (informally called gasteromycetes), the spores do not pop off. (pl. basidiabasidium The basidium (pl. basidia) is a cell on which the sexual spores (basidiospores) of basidiomycetes are produced. Usually it is club-shaped, there are four basidiospores on pegs called sterigmata (sing. sterigma), and the spores are forcibly popped off a short distance. In some groups (informally called gasteromycetes), the spores do not pop off.) is a cell on which the sexual spores (basidiosporesbasidium The basidium (pl. basidia) is a cell on which the sexual spores (basidiospores) of basidiomycetes are produced. Usually it is club-shaped, there are four basidiospores on pegs called sterigmata (sing. sterigma), and the spores are forcibly popped off a short distance. In some groups (informally called gasteromycetes), the spores do not pop off.) of basidiomycetes are produced. Usually it is club-shaped, there are four basidiospores on pegs called sterigmatabasidium The basidium (pl. basidia) is a cell on which the sexual spores (basidiospores) of basidiomycetes are produced. Usually it is club-shaped, there are four basidiospores on pegs called sterigmata (sing. sterigma), and the spores are forcibly popped off a short distance. In some groups (informally called gasteromycetes), the spores do not pop off. (sing. sterigmabasidium The basidium (pl. basidia) is a cell on which the sexual spores (basidiospores) of basidiomycetes are produced. Usually it is club-shaped, there are four basidiospores on pegs called sterigmata (sing. sterigma), and the spores are forcibly popped off a short distance. In some groups (informally called gasteromycetes), the spores do not pop off.), and the spores are forcibly popped off a short distance. In some groups (informally called gasteromycetes), the spores do not pop off.