Biting Stonecrop
Sedum acre
Tap image to enlarge · Wikimedia Commons
Overview
Biting Stonecrop creates vivid yellow carpets on bare, dry dune surfaces in May and June — one of the most cheerful early-summer sights on the coast. The name 'biting' refers to the acrid, peppery taste of the tiny fleshy leaves. It's a succulent adapted to the driest, most exposed positions on the dune. The starry, bright yellow flowers are surprisingly large relative to the tiny plant.
At a Glance
| Order | Saxifragales |
| Family | Crassulaceae |
| Habitat | Bare dune surface · Sandy path · Old dune turf · Wall tops |
| UK population | Common on walls, roofs, sandy ground and dunes throughout Britain |
| Sefton Coast | Common on dry, bare dune surfaces throughout the Sefton Coast |
| Conservation | UK Green List |
Where to See It
Dry, bare dune surfaces and sandy paths throughout the Sefton Coast. Covers sand with vivid yellow in June.
Identification
Very small, mat-forming succulent. Tiny, fat, fleshy leaves overlapping along stems. Vivid yellow, star-shaped flowers May–June. On dry, bare, sunny surfaces. Small plant (to 5cm) that covers bare sand.
Viewing & Photography Tips
Look on any bare, sunny sand or path on the dune system in June. The vivid yellow mats are unmistakeable. Nibble a tiny leaf (if you're not allergic) to understand the 'biting' name.
Conservation Status
UK Green List
This species has a favourable conservation status in the UK and remains an important part of Sefton Coast biodiversity.
Frequently Asked Questions
Why is Biting Stonecrop called 'biting'?
The leaves contain alkaloid compounds including sedamine and sarracine that produce an acrid, burning sensation on the tongue and lips — quite a shock for such a tiny plant. The biting quality has led to various folk names including 'wall pepper'. The sensation passes quickly but is memorable. This chemical defence deters grazing by most animals.
Related Species
Plan your visit to the Sefton Coast
Marshside RSPB, Formby pinewoods, Ainsdale NNR — practical guides to getting there, what to bring, and the best spots for each season.