Abstract
Summary The development of the central cord in Simonyella variegata (Roccellaceae) is studied. The central cord is built of medullary hyphae, which are parallel arranged and possess heavily swollen walls. The hyphae are embedded in a gelatinous, melanized matrix. The thallus tips do not have a central cord. The importance of the central cord is shortly discussed. The cord is compared with similar structures in other lichens.
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