Numerical taxonomy of the genus Rhizopus

Abstract
Numerical techniques were used to investigate published data from studies on the genus Rhizopus. These techniques have produced a classification broadly in agreement with that based on a more classical approach, but a regrouping of the Oryzae section of the genus, which has been the most difficult to classify in the past, is proposed. This work was based on a study of 149 attributes of each of 34 individuals. An investigation of the characters revealed that with the possible exception of temperature-response characters no particular sets of characters can be said to contribute significantly to the classification. An investigation of seven of the previous classifications using objective methods shows that three classifications are in general agreement with the one tentatively proposed here.

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