Corylus avellana, the common hazel, is a species of hazel native to Europe and western Asia, from the British Isles south to Iberia, Greece, Turkey and Cyprus, north to central Scandinavia, and east to the central Ural Mountains, the Caucasus, and northwestern Iran.
Ariocarpus furfuraceus is a cactus of the genus Ariocarpus, which can be found in the state of Coahuila in northern Mexico. It is considered by some authors as synonymous with Ariocarpus retusus.