Yellow-rattle (Rhinanthus minor) is a perennial herbaceous plant native to the United Kingdom, belonging to the Orobanchaceae family. It is commonly found in grasslands, meadows, and pastures throughout the UK, often in nutrient-poor or disturbed habitats.

Yellow-rattle thrives in well-drained soils with low to moderate fertility levels. It prefers habitats with full sun to partial shade and is often found in grasslands with a diverse range of plant species.

As a perennial plant, Yellow-rattle forms clumps of erect stems with narrow leaves and produces clusters of yellow flowers in late spring to early summer. These flowers are attractive to pollinators such as bees, butterflies, and hoverflies.

Yellow-rattle is a semi-parasitic plant, meaning it partially relies on other plants for nutrients by attaching its roots to their roots and extracting water and minerals. It often parasitises grass species, particularly those with vigorous growth, helping to control their dominance and increase plant diversity in grassland habitats.

Predators of Yellow-rattle include herbivores such as grazing mammals and insects, which may feed on its foliage and flowers. However, its bitter-tasting leaves and tough stems often provide some protection from extensive browsing.

Culturally, Yellow-rattle has been significant in grassland management and restoration projects, where it is often sown to help reduce the dominance of grasses and promote the establishment of wildflowers. It is also valued for its ecological importance in supporting pollinators and increasing plant diversity in grassland ecosystems.