When I went to weed the 'Moon' Bed on the Upper Green in Hunstanton this afternoon I found Yellow Dodder Cuscuta campestris growing in the white lobelia in the 'Moon's Mouth'.
Yellow Dodder is an alien and a native of North America. In Britain it parasitizes a variety of cultivated plants including tomato and carrot as well as species of Medicago and Trifolium. It was originally introduced into Europe with agricultural seed in about 1900. It has orange/yellow stems and clusters of small white/yellow flowers.
(I only had my mobile with me so no close-ups of the flowers.)