Adventitious roots of certain plants become green and carry out photosynthesis, such roots are called assimilatory or photosynthetic roots, eg, Tinospora, Trapa, Taeniophyllum. In Tinospora, these are like green, hanging threads developing from the nodes during the rainy seasons and shrivel during drought. In banyan, prop roots or pillar roots are found, while Cuscuta is a total root parasite. In Vanda, epiphytic or hygroscopic roots are found but these may also photosynthesize with the help of chloroplast contents present below the velamen coating.