Flora, life forms and chorotypes of plants in Selkeh lagoon, N. Iran

Selkeh or Sofiandeh lagoon as wildlife refuge is located in north of Iran، it covers an area about 366 hectares. This area is between the 37o 23''-37o 24'' north latitude and 49o 27''-49o 30'' east longitude. In Selkeh lagoon 102 species recognized، which belong to 46 families and 84 genera. Among these families represented in the area 5 species belong to pteridophyta، 64 species to dicotyledons and 33 species to monocotyledons. The following families have the highest number of species: Poaceae (13 species)، Asteraceae (9 species)، Brassicaceae (7 species) and Cyperaceae (6 species). Cryptophytes and therophytes with 41. 2 % and 40. 2 % were respectively the most frequent life forms of the lagoon. 53 % of species are cosmopolitan and 17. 6 % have Euro-Siberian - Irano-Turanian - Mediterranean chorotype. Hygrophytes and Helophytes - Hygrophytes with 57 % and 21. 6 %، respectively have the highest frequency in the Selkeh lagoon.