Mining in Portugal is regulated by the Portuguese Ministry of Economy and the Geology and Energy Resources authority under the state-run research institute INETI. Mining activities have continued since the pre-Roman era, when most of the region was known as Lusitania. Gold was once mined. The country remains among the largest European producers of copper and minerals.
Tin, tungsten and uranium are some of its other mineral resources. However, the country lacks hydrocarbon exploration potential, as well as iron, aluminium or coal. The most prominent mines in the country are Neves-Corvo, Panasqueira and Mua.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction