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Common Rock-rose

©Philip Precey

Common rock-rose

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Enw gwyddonol: Helianthemum nummularium
Golden banks of common rock-rose make a spectacular sight on our chalk and limestone grasslands in summer. A creeping shrub, it is good for bees, moths and butterflies.

Top facts

Stats

Height: up to 40cm

Conservation status

Priority Species under the UK Post-2010 Biodiversity Framework.

Pryd i'w gweld

January to December

Ynghylch

Common rock-rose is a low-growing, creeping, evergreen shrub that likes sunny chalk grassland, cliffs and rocks. It flowers from June to September and can grow in dense clusters, colouring the grey-green landscape bright yellow. Common rock-rose provides plenty of nectar for various bees and is also the foodplant of several species of butterfly such as the brown argus, green hairstreak and rare silver-studded blue.

What to look for

Common rock-rose flowers are large, with five bright yellow, crinkly petals. The underneath of its lanceolate leaves is white and woolly.

Where to find

Found throughout the UK, but especially common in Scotland and Southern England.

Habitats

Roeddech chi yn gwybod?

The Latin name, Helianthemum, means 'sunflower'; indeed, the bright yellow flowers of the common rock-rose only open in the sunshine and close at night.