Thus it was easy to perceive B. verticillata as falling within the range of variation of this broadly defined species.

Your use of cladistic taxonomy clashes with the way Galactic science has defined and organized species for a billion years.

At one extreme, Eckenwalder (1980) included all these plants in a single broadly defined species, Z. pumila.

Most other botanists have recognized several more narrowly defined species.

Biologists do not know how to identify or how to define species.

The autapomorphic species concept is one of many methods that scientists might use to define and distinguish species from one another.

One application of these specific molecular techniques is in defining species and sub-species of salmonids.

The process of selection during domestication has largely focused on core traits that have come to define domesticated species.

Practically, biologists define species as populations of organisms that have a high level of genetic similarity.

Also he was over reliant on colour and pattern as characters, and this led to his improperly defining species.