Liguria was a late Roman province in Italy in the 4th–6th centuries. Despite its name, it encompassed most of the modern Italian region of Piedmont and parts of Lombardy, but not the medieval and modern region of Liguria, which was included in the province of Alpes Cottiae. The province's capital was Mediolanum (Milan) and it was governed by an official of consularis rank. Administratively, it was subject to the Diocese of Annonarian Italy and to the praetorian prefecture of Italy.
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