Taxonomy
There is only one genus of Venus flytrap … Dionaea muscipula Soland. ex Ellis. However there are many different varieties of this one species.
Most cultivar species are distinguished by the colour of their traps, their trap shape and the size of their traps. Traps with strange shapes such as short or triangular shaped spines, deep red colours and abnormally large traps are often given their own names.
For detailed information on the taxonomy of carnivorous plants I recommend checking out Barry Rice’s carnivorous plants taxonomy page.
Photo courtesy of Thane.