Abstract
A study of four species of Cuscuta L. present in Saudi Arabia has been carried out. The study gives detailed morphological descriptions of three species, viz. C. campestris Yuncker, c. pedicellata Ledeb. and C planiflora Tenore and their distribution in Saudi Arabia. C hyalina Roth., C. monogyna Vahl and the possible occurrence of few other species in the Kingdom are discussed briefly. A tentative Key is also provided for its identification.