There are two species of Clematis that occur in Tarra Bulga National Park and surrounding forest areas, Forest Clematis (Clematis glycinoides) and Mountain Clematis (Clematis aristata) and it can be very difficult to tell the difference between them. They are climbing plants that can climb high into trees and produce a mass of attractive white flowers in Spring. Both of them have leaves in groups of three of a similar size, Clematis aristata commonly has teeth or serrations on the leaf margins but both species show variation.
There are two main ways to tell the difference between the two out in the field. The first is flowering time. Clematis glycinoides tends to flower in early spring, with most of its flowering finished by mid-October, then Clematis aristata seems to take over to be the dominant flowering species for a month or so, although locally it is less common. The other way is a key but subtle difference in the flowers. If you look carefully at a flower the tips of the anthers have little appendages, In Clematis glycinoides they are very short <1mm or even absent. In Clematis aristata they are clearly longer usually around 2 or 3mm long.