Rock Samphire
Crithmum maritimum
Also known as: Rock Samphire, Sea Fennel, Sea Samphire, Crest Marine
'Crithmum' comes from the Greek 'krithe' (barley), possibly referring to the grain-like seeds. 'Maritimum' means 'of the sea'. 'Samphire' derives from the French 'Saint Pierre' (Saint Peter, patron saint of fishermen), reflecting its abundance on sea cliffs. The common name 'sea fennel' reflects its strong, aromatic, fennel-like fragrance – though it is not related to true fennel (it is rather a member of the carrot/parsley family, Apiaceae). Rock samphire is an aromatic perennial found growing in rock crevices, cliffs, and coastal headlands, particularly on exposed limestone or rocky promontories near the sea. Native to the Mediterranean and Atlantic coasts of Europe, it is also found naturalised in some southern Australian coastal areas. It is one of the great classic edible plants of the European culinary tradition, prized for centuries as a pickle and flavouring. The essential oils give it a unique, complex aromatic flavour – citrusy, anise-like, and herbal.
When to Forage
Leaves available year-round; flowers in summer; seeds ripen in autumn.
Cautions
Generally safe in culinary quantities. Contains furanocoumarins – photosensitising compounds that can cause skin reactions (photodermatitis) on sun-exposed skin after contact with the plant's sap. Wear gloves when harvesting in sunny conditions, and wash hands before going out in the sun. Avoid consuming in large medicinal doses during pregnancy.
Nutrition
Rich in essential oils (monoterpenes, sesquiterpenes). Contains vitamins C and E, beta-carotene, flavonoids, and minerals including iodine and potassium. The vitamin C content made it historically valuable for preventing scurvy on long sea voyages.
How to Identify
- Fleshy, succulent, blue-green leaves divided into narrow, finger-like, cylindrical segments – each leaflet is thick and rounded in cross-section.
- Strong aromatic smell: a blend of fennel, citrus, and parsley when leaves are crushed.
- Grows as a compact mound in rock crevices and cliff ledges, often in exposed, salt-sprayed positions.
- Small, compound umbel flowers (like a small Queen Anne's Lace) in white or greenish-cream, appearing in summer.
- Seeds are ridged, oval, and aromatic.
Lookalikes
Hemlock, another member of the carrot/parsley family, also has compound umbel flowers and may grow near water or coastal areas. It is distinguished from rock samphire by growing much taller; having flat (not rounded, succulent) leaf segments; hollow, purple-mottled stems; and a distinctly unpleasant, musty, mousy smell rather than the pleasant aromatic scent of samphire. Never eat any umbel-family plant unless 100% certain of identification.
How to Forage
Harvest young, succulent leaf tips with scissors or by snapping, focusing on the fresh, bright-green growing tips. The plant grows in challenging, exposed positions – take care on cliffs and rocks. Harvest sparingly, as populations may be limited; take no more than 10% of any visible patch.
Recipe — Rock Samphire and Potato Bake with Cashew Cream
Ingredients: 2 large handfuls rock samphire tips; 4 medium potatoes, thinly sliced; 1 cup raw cashews (soaked 2 hours, drained); 200 ml water; 2 tbsp nutritional yeast; 2 cloves garlic, sliced; 1 tbsp lemon juice; salt, pepper, olive oil. Method: Blanch the samphire tips in boiling water for 1 minute and drain. Blend the soaked cashews with the water, nutritional yeast, lemon juice, and a pinch of salt until very smooth to make a cashew cream. Layer the potato slices in an oiled baking dish, scattering the garlic and samphire between layers. Pour the cashew cream over, season, and drizzle with olive oil. Cover with foil and bake at 180°C for 30 minutes, then remove the foil and bake for a further 15 minutes until golden and tender. Rest for 10 minutes before serving.
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