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Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Rosids Order: Malpighiales Family: Hypericaceae Genus: Hypericum Species: H. calycinum Binomial name Hypericum calycinum It is a low, creeping, woody shrub to about 1 m tall and 1–2 m wide but often smaller. The green, ovate leaves grow in opposite pairs. The solitary flowers are 3–5 cm in diameter, a rich yellow, with five petals and numerous yellow stamens. It is indigenous to southeast Europe and southwest Asia. It is a popular, semi-evergreen garden shrub with many named cultivars and hybrids derived from it. In North America the name Rose of Sharon is applied to a species in a different order, Hibiscus syriacus. This species is capable of producing the medicinally active components of H. perforatum (hyperforin etc.), though in different ratios, with adhyperforin predominating, and a low level of hyperforin present.
Hypericum calycinum is a prostrate or low-growing shrub species of the genus Hypericum (Hypericaceae). Widely cultivated for its large yellow flowers, its names as a garden plant include Rose of Sharon in Britain and Australia, and Aaron's beard, Great St-John's wort, and Jerusalem star. Grown in Mediterranean climates, widely spread in the Strandja Mountains along the Bulgarian and Turkish Black Sea coast
spotted in th enterence of the Vikla Nova de Gaia Biological Park