the Tacca and the Zenobia are both native to South America?
Tacca The genus "Tacca", which includes the batflowers and arrowroot, consists of flowering plants in the order Dioscoreales, native to tropical regions of South America, Africa, Australia, Southeast Asia, and various oceanic islands. In older texts, the genus was treated in its own family Taccaceae, but the 2003 APG II system incorporates it into the family Dioscoreaceae. The APG III and APG IV systems continue to include "Tacca" in Dioscoreaceae.
Iriartea Iriartea is a genus in the palm family Arecaceae, native to Central and South America. The best-known species – and probably the only one – is Iriartea deltoidea, which is found from Nicaragua south into Bolivia and a great portion of Western Amazonian basin. It is the most common tree in many forests in which it occurs. It is known by such names as bombona (which can also refer to other palms, e.g. "Attalea regia") or cacho de vaca (which can refer to many other plants, like the Bignoniaceae "Godmania aesculifolia" or the orchid "Myrmecophila humboldtii"). In the Murui Huitoto language of southwestern Colombia, it is called "jɨagɨna" or "jɨaìgɨna", in western Ecuador it is known as pambil and in Peru it is known as the pona palm.