Abstract
SUMMARY The ascocarp of Ascobolus magnificus originates from a pair of morphologically distinct primordial—a large ascogonium the end of which functions as a trichogyne, and a club-shaped antheridium. Papulospora magnifica Hotson is an asexual stage of Ascobolus magnificus Dodge. The intrahyphal mycelium, found in old cultures is simply a case of “Durchwachsungen,” or “cordon interne.” The strains here reported, which were obtained from germinated papulospores or ascospores, were self-sterile in the experiments conducted, but always produced papulospores. Sexual reproduction occurs in cultures containing two strains properly chosen.

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