The Flora of Bitlis River Valley

Authors : Abdullah ALTIOK, Lütfi BEHÇET

Pages : 355-387

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This paper describes a floristic study of Bitlis river basin. The research was carried out from 2001 and 2003 to 2150 vascular plant specimens were collected. After the identification of the specimens, the flora was determined to include 925 taxa insert ignore into journalissuearticles values(at specific and infraspecific ranks); belonging to 770 species, 386 genera and 85 families. One hundred and seventy-nine taxa were defined as new records for the B9 square. The endemism rate of the area is 6.8% based on 63 taxa. The largest families are Asteraceae insert ignore into journalissuearticles values(109 taxa);, Fabaceae insert ignore into journalissuearticles values(101 taxa); and Poaceae insert ignore into journalissuearticles values(77 taxa);. The largest genera are Trifolium L. insert ignore into journalissuearticles values(27);, Astragalus L. insert ignore into journalissuearticles values(22); and Silene L. insert ignore into journalissuearticles values(18);. The phytogeographic elements are represented in the study area as follows: Irano-Turanian 292 insert ignore into journalissuearticles values(31.8%);, Mediterranean 81 insert ignore into journalissuearticles values(8.7%); and Euro-Siberian 46 insert ignore into journalissuearticles values(4.9%);. When the flora of the area is analysed by Raunkiaer’s life form system, the results are as follows: hemicryptophytes 345 insert ignore into journalissuearticles values(37.3%);, therophytes 308 insert ignore into journalissuearticles values(33.3%);, chamaephytes 103 insert ignore into journalissuearticles values(11.1%);, cryptophytes 101 insert ignore into journalissuearticles values(10.9%); and phanerophytes 68 insert ignore into journalissuearticles values(7.35%);. The descriptions of 29 species in our study were different in terms of some characteristics from the descriptions in the Flora of Turkey and in some cases from the flora of neighbouring countries.
Keywords : Flora, Bitlis, Turkey