Yeah, it's a trwo-part heirarchical system of genus and species. Species is the lowest "rank" in the heirarchy. For example we are
Homo sapiens. That means we belong to the genus
Homo, and we are the species sapiens. There is also
Homo neanderthalis. Neaderthalis and sapiens are two different species, but they are related and are both of the genus
Homo. The genus is often simply written at the capital followed by a full stop and is usually itallicised. For example
H.sapiens or
H.neanderthalis. The bacteria
E. coli is actually
Escherichia coli.
In the above example of
Daldinia concentrica (
D. concentrica), the genus is actually Daldinia and the species is concentrica. So Ray was wrong. The fungus was of the genus
Daldinia, or more correctly, a
Daldinia sp. (an unknnown species of the
Daldinia genus).