Abstract
Rate of emergence of seedlings from the uppermost 2 cm layer of soil from different habitats of the desert of North, South-west and South-East of Riyadh City in the Central Region of Saudi Arabia was examined. In most of the sites the emergence of the seedlings started after one week. The number of individual plants that emerged at the end of the experiment ranged from 44 to 2660 plants m(2). A number of 59 species of plants were identified. Biomass of the emerged seedlings ranged from 0.356 to 308.524 per sq metre.