The Myersii cultivar (Foxtail Fern) is not to be confused with the Asparagus aethiopicus 'Sprengeri' (Asparagus Fern) which is a declared weed in many countries around the world, including Australia. The 'Sprengeri' is now considered a completely separate species to the Myersii, since the two have very different growth habits. The Sprengeri is quite invasive, and tends to have thin stems that do not stand up on their own, and sparse leaflets on each stem. The Myersii on the other hand is much denser, more upright, and most importantly, does not get out of control, staying in tight clumps.