Keywords: Cyathus-olla-in-Martin-1927.jpg en Basidia and spores of the bird's nest fungus Cyathus olla Figures renumbered <br /> 1-3 Mature basidia with two three and four spores; <br />4 Basidium collapsing with spores still attached; <br />5 Spores immediately after separation from basidia showing conspicuous apiculus; <br />6 Older spores; apiculus nearly or quite gone Martin GW 1927 Basidia and spores of the Nidulariaceae Mycologia 19 5 239-247 Plate 22 George W Martin 1927 PD-old Cyathus olla |