Complex sentence: The species survival is not threatened at all, as it is grown commercially for potted plants, however, the native, natural stands of A. heterophylla were always restricted and have been much reduced since Capt. Cook's time.
Split into simpler sentences: The species survival is not threatened at all, as it is grown commercially for potted plants. However, the native, natural stands of "A. heterophylla" were always restricted and have been much reduced since Capt. Cook's time.