Zantedeschia aethiopica - giant arum lily or common arum lily
Zantedeschia is a genus native to southern Africa from South Africa to Malawi. It grows continuously when watered and fed continuously and can survive periods of minor frosts. Z. aethiopica is a very strong and sturdy plant, being able to grow in many soils and habitats, multiplying by rhizome-offsets; it is naturalised and regarded as a weed throughout the world. It is also commonly called calla lily, confusing as it is the scientific name of the related genus Calla.
These have been among the few joys of my temporary garden but new fields will be opening soon.