Abstract
Pictures taken with the ‘Stereoscan’ electron microscope of the Cambridge Instrument Company Ltd. confirm the conclusion reached earlier ( Hawker, Fraymouth & de la Torre, 1967 ) that ornamentation of ascospores of Elaphomyces granulatus Fr. results from the formation of rods within a gelatinous exospore and the variable coalescence of these as the matrix dries. The final appearance depends on age at time of collection and rate of drying after collection. Ornamentation of spores of E. muricatus Fr., E. anthracinus Vittad. and E. aculeatus Vittad. is derived from an outer layer of rod-like structures similar to that described for E. granulatus.
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