Populated places in Estonia (officially: settlement units[a]), are cities or settlement units of rural municipalities, but only cities have administrative functions. Settlement units are divided into settlements[b] and urban regions[c] (subdivisions of cities).
Officially there are four types of settlement units in Estonia:
- town/city (Estonian: linn)
- borough (Estonian: alev)
- small borough (Estonian: alevik)
- village (Estonian: küla)
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