Abstract
Weeds are wild plants grow in an environment without the contribution of any human activities that that have positive or negative impact to the environment. The study aims at carrying a survey on weeds of family Poaceae grown in cultivated environment with purpose of recording and identification. The study was conducted in the Taif region of Saudi Arabian kingdom in a mountain with an elevation level of (Area A = Al sail 1700 m, Area B = Al Wahat and Al Watit 1500, C = Leeih 1500, D = AL Gaim and Saisad 1500, F = E = Al Shafa 2200 m, F = AL Hada = 2000 m). The study was conducted during December 2017 to December 2018. The study was carried out based on environmental survey. Diverse number of weeds were identified and collected from the examined study area. Results revealed 23 species of weeds from the family in the study field. Rosa damascene have the highest number of abundances with 656, followed by Digitaria sanguinalis 618, Cynodon dactylon 562 and Minuartia fififofia with least abundance 17 among all the documented species. The study provided the base line information on the diversity and distribution of weeds from the family Poaceae which will be used for the control of weeds in the area to enhance agricultural productivity in terms of quality and yield. Also has provided insight on purposeful weeds control in Taif Area. The study recommends further studies on order types of weeds in the area.