The parasitic plant with yellow, slender, and tubular stems you’re describing is likely the “Dodder” plant. Dodder, scientifically known as Cuscuta, is a parasitic plant that lacks chlorophyll and appears yellow or orange. Its thin, thread-like stems wrap around host plants, extracting water and nutrients to survive since it cannot produce its food through photosynthesis. Dodder’s stems have a distinctive, twining appearance and can vary in color from yellow to orange.