Iwanai (岩内郡, Iwanai-gun) is a district located in Shiribeshi Subprefecture, Hokkaidō, Japan.
As of 2004, the district has an estimated population of 22,977 and a density of 61.17 persons per km2. The total area is 375.60 km2.
Towns and villages
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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