Seasonal, Biometric and Dynamic Monitoring of the Shihia Plant Cotula cinerea Del (1831) and its Accompanying Plants in the Saharan Region Oued-Souf (South-East of Algeria)

This work is for the purpose of making a biometric and dynamic study for the plant Cotula cinerea Del and its accompaniers in the region of Oued- Souf through the annual monitoring during the year 2009-2010. After studying and monitoring it was found that the distribution of plants is controlled by external factors (the amount of rainfall, seasonal temperature and the soil). and the development phase of the plant. life depends on many factors thus a phase can be just two weeks, so that the number of individuals has a direct correlation with the coverage rate and the diameter of the plant and the number of branches these height is in fruiting period, these standards may be assigned by external factors. Also that the rate of pollination is low because of the absence of ray flowers among these plants which causes the absence of pollinating insects. For the territorial monitoring there were 34 species of accompanying plants belong to 15 families most part of it divided into 4 botanicals family: Asteraceae, Chenopodiaceae, Poaceae and Borraginaceae, and we observed the dominance of the annual species Throphytes that represents 64 % and this completes these life in short periods.