Sinna was a Roman era civitas of the Roman province of Africa Proconsularis.
This ancient city is tentatively identified with ruins at Calaat-Es-Senan in modern Tunisia.
The ancient town was also the seat of a Christian bishopric (in Latin Rite Sinnensis) suffragan of the Archdiocese of Carthage.[1][2] The only bishop known of this diocese is Victor, who attended the Council of Constantinople in 553. Sinna survives today as a titular bishopric. Its current bishop is Arūnas Poniškaitis of Vilnius.
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