Taxonomic notes on the New Zealand flora: Coprosma dumosa and C. tayloriae, are there two species?
2011
Glenny, D | Cruickshank, J
Coprosma dumosa and C. tayloriae were compared to test whether they are two species as proposed by Jane (2005). Length of visible midvein and depth of corolla sinuses, characters used by Jane (2005) to differentiate the pair, were not significantly different between herbarium specimens determined by Jane as C. dumosa and C. tayloriae. No significant difference in visible midvein length for the five fruit colours recorded on specimens was found. However, fruit colour correlated with altitude, red-fruited specimens coming from higher altitudes than white-fruited specimens. Representative specimens of C. dumosa and C. tayloriae cited by Jane (2005) included specimens we redetermined as C. ciliata and C. pseudociliata. These and similar misidentifications of herbarium specimens suggests that Jane's (2005) concept of C. dumosa is based on a mixture of three species. We believe Jane (2005) has failed to reject the hypothesis that C. dumosa and C. tayloriae are conspecific.
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