Sideritis leucantha

In southern Spain, especially in Andalusia, Sideritis leucantha—locally called “leche de gallina”—is used as a remedy for colds, sore throats, and coughs; infusions of the aerial parts are prepared at home and taken warm, often sweetened, according to ethnobotanical surveys of traditional plant use by Vallès and in García et al., 2013. In Catalonia, herbal practitioners similarly use infusions or light decoctions of the flowering tops as a digestive and comforting drink after meals (Vallès, 2004; García et al., 2013). On the Balearic Islands, especially Majorca, people have long prepared the same simple infusions to help with upper‑respiratory complaints and as a general tonic, with the practice documented in the ethnobotanical monographs of Vallès and collaborators (García et al., 2013). Across these regions the traditional preparation is almost always an infusion or light decoction of the whole aboveground herb; poultices are rarely mentioned and are not well documented for this species.

For a practical and safe preparation, the common “mild tea” can be made with 1 to 2 teaspoons of the dried flowering herb per cup (about 240 ml) of just‑boiled water. Cover the cup and steep for 5 to 8 minutes, then strain. The drink is often taken warm in small cups before or after meals or as a warm, comforting beverage when feeling under the weather. Adults commonly use this tea a few times daily during colds or for occasional digestive comfort; however, people with known allergy to Lamiaceae (the mint family) should avoid it, and because safety in pregnancy and during breastfeeding has not been established, those populations should consult a clinician before use (Vallès, 2004; García et al., 2013).

The plant’s traditional actions align with its well‑documented chemistry. Laboratory analyses consistently report flavonoids such as luteolin and apigenin, as well as their glycosides, together with terpenoids and an essential‑oil fraction that includes phenylpropanoids like carvacrol; these compounds are recognized from many Sideritis species and are considered plausible contributors to the mild respiratory and digestive effects described by users (García et al., 2013; Vallès, 2004).

Today, the species is still locally harvested or obtained from small regional herb vendors for home teas and simple decoctions, and it appears in ethnobotanical and phytochemical surveys that investigate Mediterranean “tea” herbs; commercial availability varies by region, but interest persists both among home users and researchers interested in the chemistry and comparative uses of Sideritis species (Vallès, 2004; García et al., 2013).

Common products:
No documented commercial, industrial, craft, or culinary products have been reported for Sideritis leucantha. The literature provides chemical data for the essential oil but does not record specific product applications.

Food and beverages (non-medicinal):
No documented uses.

Colorants and tanning:
No documented uses.

Wood and fiber:
No documented uses.

Fragrance and cosmetics:
No documented product applications.

Properties relevant to use:
Chemical studies report an essential oil from aerial parts, characterized by high levels of sesquiterpene hydrocarbons (e.g., α-humulene, β-caryophyllene, caryophyllene oxide) and moderate oxygenated sesquiterpenes; monoterpenes are minor, with α-pinene and 1,8-cineole detected only in trace amounts. The sesquiterpene-rich profile suggests low volatility relative to many monoterpene-rich oils (Skaltsa et al., 1999).

Standards and regulation:
No specific standards or regulatory frameworks are documented for this species or its derivatives.

Sustainability and sourcing:
No documented data.

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No variety added yet.

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No forms added yet.

No germination or propagation data was added yet.

No reference genome is available on NCBI yet. We are constantly monitoring for new data.

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