Yellow rattle
Rhinanthus minor, the yellow rattle, little yellow rattle[1] or cockscomb, is a flowering plant in the genus Rhinanthus in the family Orobanchaceae, native to Europe, northern North America, and Western Asia. It is a hemi-parasitic herbaceous annual plant that gains some of its nutrients from the roots of neighbouring plants. It grows to 25–50 cm tall, with opposite, simple leaves, with a serrated margin. The flowers are yellow, produced on a terminal raceme.
Photo: CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=294582