This species with a mainly western Mediterranean distribution finds in Sardinia the eastern boundary of its distributional range. The life-cycle can be spent part in water, part on moist to dry soil. It grows in pools and ponds that are flooded only in winter and spring, but are dry in summer, from sea level to approximately 300 m. It is a characteristic species of the Mediterranean temporary ponds, but in Sardinia it has so far been found in three sites only: Mt. Minerva (Villanova Monteleone), Pond of Bara (Macomer), Pauli della Giara (VS). It falls into the vulnerable category of the Italian Red Lists (Caria & Bagella, 2011). The genus name is of uncertain etymology: it could derive from the Greek 'eryngion' (hedgehog) or 'eryma' (defense), in both cases alluding to the strong prickliness of the plant; the species name refers to the shape of the bracts of the inflorescence, which are linear and horn-shaped. Flowering period: June to August.

Italian name(s): Calcatreppola cornuta (Italia).