Birds of Paradise, also called Strelitzia, are perennial plants native to South Africa. They are also sometimes called crane flowers.
The canna lily (which is not really a lily) is related to banana plants and strelitzias. In addition to producing large flowering plants, it is also one of the world's richest starch sources. It is found in the tropics, but is easy to grow in most countries with sunny summers.
Lamb’s ear (Stachys byzantina) is native to Turkey, Armenia and Iran. It is cultivated in temperate regions as an ornamental plant.
Emerald fern, or Sprenger's Asparagus, is native to South Africa (and is not really a fern). "Sprenger's Asparagus" refers to Carl Ludwig Sprenger, who made it popular in Europe as an ornamental plant.