Yellow-rattle

©Neil Wyatt

Yellow-rattle

Enw gwyddonol: Rhinanthus minor
Brush through a wildflower meadow at the height of summer and you'll hear the tiny seeds of yellow-rattle rattling in their brown pods, hence its name.

Species information

Ystadegau

Height: up to 45cm

Statws cadwraethol

Common.

Pryd i'w gweld

May to September

Ynghylch

When the flowers of yellow-rattle fade, the brown calyxes (containing the sepals) in which the tiny seeds ripen can be seen and heard - they give a distinctive 'rattle', hence the common name. Yellow-rattle is an annual that thrives in grasslands, living a semi-parasitic life by feeding off the nutrients in the roots of nearby grasses. For this reason, it was once seen as an indicator of poor grassland by farmers, but is now often used to turn improved grassland back to meadow - by feeding off the vigorous grasses, it eventually allows more delicate, traditional species to push their way through.

Sut i'w hadnabod

Yellow-rattle has yellow, tube-like flowers protruding from an inflated, green calyx, which appear May to September. It has serrated leaves with heavy, dark veins, which sprout opposite each other all the way up the stem. Its stems have black spots.

Dosbarthiad

Widespread.

Roeddech chi yn gwybod?

Yellow-rattle is the foodplant for the larvae of two rare moths, including the grass rivulet.

Sut y gall bobl helpu

The Wildlife Trusts look after many meadow habitats using traditional methods, such as hay-cutting, reseeding and grazing, for the benefit of local wildlife. We are also working closely with farmers and landowners to promote wildlife-friendly practices in these areas. You can help too: volunteer for your local Wildlife Trust and you could be involved in everything from stockwatching to surveying meadow flowers.