TAILIEUCHUNG - Báo cáo " Flora of the Research Forest in Yen Tu, Quang Ninh "

The vascular flora of the Research Forest in Yen Tu, Quang Ninh was assessed between 2005 and 2006. In the area under review, 721 species belonging to 425 genera and 154 families were identified. Among these species, these are 9 Lycopodiophyta, 34 Polypodiophyta, 8 Gymnospermae and 670 Angiospermae species (577 Dicotyledonae, 93 Monocotyledonae). The richest 3 families are Euphorbiaceae with 52 () species, Asteraceae with 30 () species and Moraceae with 30 () species. The richest genus is Ficus L., (22 species) followed by Syzygium Gaertn., (8 species) and Dioscorea L., (7 species). When the flora of the area is analysed by Raunkiaer’s life form system, the. | VNU Journal of Science Natural Sciences and Technology 23 2007 194-199 Flora of the Research Forest in Yen Tu Quang Ninh Nguyen Trung Thanh1 Phung Van Phe2 Nguyen Nghia Thin1 1Department of Biology College of Science VNU 334 Nguyen Trai Hanoi Vietnam 2Department of Forest Plant Forest University of Vietnam Xuan Mai Chuong My Ha Tay Received 14 November 2006 Abstract. The vascular flora of the Research Forest in Yen Tu Quang Ninh was assessed between 2005 and 2006. In the area under review 721 species belonging to 425 genera and 154 families were identified. Among these species these are 9 Lycopodiophyta 34 Polypodiophyta 8 Gymnospermae and 670 Angiospermae species 577 Dicotyledonae 93 Monocotyledonae . The richest 3 families are Euphorbiaceae with 52 species Asteraceae with 30 species and Moraceae with 30 species. The richest genus is Ficus L. 22 species followed by Syzygium Gaertn. 8 species and Dioscorea L. 7 species . When the flora of the area is analysed by Raunkiaer s life form system the results are as follows phanerophytes 596 chamaephytes 20 hemicryptophytes 15 cryptophytes 37 therophytes 37 and unknown 16 species respectively. Keywords Vascular plant Flora Yen Tu Quang Ninh Research Forest. 1. Introduction This research was carried out to determine the flora of the Research Forest in Yen Tu Quang Ninh. The vegetation of the area has been extensively destroyed by anthropogenic effects and therefore plants try to survive under unsuitable conditions. On the other hand there are not publish in here. Therefore new report should be prepared for the conservation of plant species. The Research Area is located within the borders of the North by Son Dong district Bac Giang province in the East by Vang Danh village in the West by Trang Luong Dong Trieu district and in South by Dong Thi Uong Bi district Quang Ninh province . It is about Corresponding author. Tel. 84-4-8582178. E-mail thanhtaxon@ 2686 ha in size and is .

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