Both Eliocharis acuta and E. pallens are present. Distinguishing between the two is difficult (for me). Apparently you need to like at the rhizomes to distinguish these two - that means bending down. E. sphacelata grows to over a metre tall compared to ~3
The long leaves of the host plant look like Variable Plantain (Plantago varia).
Cuscuta (Dodder) is a genus of about 100-170 species of yellow, orange or red (rarely green) parasitic plants.