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Xueyuan (simplified Chinese: 学员; traditional Chinese: 學員; pinyin: Xuéyuán) is an officer cadet within the People's Liberation Army. The rank was established in 1988 as part of the revival of the use of rank by the People's Liberation Army. No equivalent rank existed in pre-Cultural Revolution system of rank used by the PLA between 1955 and 1965.
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