Nassella tenuissima
[4] The availability of N. tenuissima via the internet and other plant purchasing situations makes its entry and naturalization in Australia almost inevitable.[2] It is similar in appearance to Nassella trichotoma (serrated tussock) and has been recorded in Australia as a weed initially mistaken for that other invasive species.[2] In Australia, it is considered a major threat to eucalypt woodlands and native grasslands, with government modelling indicating that up to 169 million hectares could be at risk.[9] Serrated tussock, which is estimated to cost New South Wales agriculture more than $40 million annually,[10] is said to be causing a greater reduction in pasture carrying capacity than any other weed in Australia, yet N. tenuissima is thought to be capable of occupying 6 times the area predicted for serrated tussock.[11] A similar violation occurred in 1996 when a Victorian nursery imported the seeds by labelling with an earlier valid scientific name, Stipa tenuissima.