Most of New Zealand was divided into tribal territories called rohe, resources within which were controlled by hapū ('subtribes'). Māori adapted their tropically-based culture to eating the local marine resources, flora and fauna for food. They also hunted the giant flightless moa (which soon became extinct). They showed great ingenuity in adapting their tropical agricultural technology to a temperate climate, successfully cultivating taro, gourds, kumara (sweet potato), and other plants which they introduced from Polynesia; it is thought that kūmara were grown as far south as Banks Peninsula in the middle of the South Island. While it was fairly easy to grow these crops in the north, these warm-climate crops were impractical in the south of the South Island. However, inter-regional trade and the exploitation of the few food plants of the local flora made up the difference. They also introduced other plants such as the paper mulberry or 'aute', used to make barkcloth for kites and for personal adornment.