Weeks Stack (62°13′38.1″S 59°2′44.5″W / 62.227250°S 59.045694°W) is a sea stack lying off the north tip of Nelson Island in the northern approach to Fildes Strait, in the South Shetland Islands. Situated 635 m north-northeast of Cariz (Agrelo) Point. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1961 for Captain Weeks, Master of the British sealing vessel Horatio from London, who visited the South Shetland Islands in 1820–21.
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This article incorporates public domain material from "Weeks Stack". Geographic Names Information System. United States Geological Survey.
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