Shrub of the Cistaceae family, native to the western Mediterranean coast, the south of the Iberian Peninsula, and the Atlantic Morocco, where it colonizes low garrigues, fixed dunes, dry lawns, and open maquis on poor sandy or siliceous substrates, under a hot and dry climate.
In natural conditions, it forms a compact and bushy shrub, rarely exceeding 80 cm to 1 meter, with woody stems from the base. But an old specimen cultivated in a sheltered position can take on a very different form: upright, candelabra-like, with visible woody framework, the stems freely reaching towards the light. The specimen photographed in Saint-Palais, in Béarn, reached nearly one and a half meters, a remarkable testament to what the plant can express outside its native environment.
The leaves are small, oval, gray-green, slightly sticky, and aromatic when crushed. The flowers, a bright and luminous yellow, with five crumpled petals, are uniformly colored, without dark spots at the base, whereas the species is traditionally described with such purplish-brown spots — a characteristic well borne by H. lasianthum or H. ocymoides. Ephemeral like all Cistaceae, the flowers last only one day, quickly littering the ground with their fallen petals. In its natural habitat, flowering extends from April to June. In cultivation under mild climates, it can begin as early as March.
It requires full sun, perfect drainage, and poorly tolerates cold and wet winters. Hardy to about -8°C in well-drained soil.