Riva Castle (Turkish: Riva Kalesi), is a Byzantine coastal fortification situated on a hill where Riva Creek meets the Black Sea in Riva, Beykoz, Istanbul. In Greek mythology, the leader of the Argo sailors, Iason, searching for the Golden Fleece received the iron anchor, hence the village was referred to as Ancyranum during the reign of the Eastern Roman Empire.[1]
The Ottoman Sultan Bayezid I referred to the importance of occupying it after taking over its neighboring castles, Yoros and Şile in 1391 AD (793 AH).[2] It was first recorded in the archives as Revan Kalesi in 1778-1779 AD (1192 AH).[1]
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