Ostrov u Jedomělic

Ostrov u Jedomělic is a small nature reserve set on a steep, southeast-facing slope near the village of Jedomělice, in the Kladno district of the Czech Republic. The site lies within the Džbán Nature Park and is managed by the Central Bohemian Regional Authority. Its name references nearby earthwork remains of a fortified settlement and a medieval village, though today the place draws visitors mainly for its botanical value rather than its historical traces.

Why was this site protected?

The reserve was declared in 1987 to protect a population of white dittany (Dictamnus albus), a heat-loving plant that has become increasingly rare across central European landscapes. Alongside dittany, the site supports other thermophilic species, including bastard balm (Melittis melissophyllum) and purple gromwell (Aegonychon purpurocaeruleum). Their presence points to a distinctive microclimate on this sun-exposed slope, one that favors warmth-loving plants seldom found elsewhere in this part of the country.

In 2016 the area gained an additional layer of protection when it was designated a Natura 2000 Site of Community Importance under the same name, confirming its significance at a European level for preserving thermophilic habitats.

What does the reserve's landscape look like?

Geomorphologically, the area belongs to the Řevničov Hills, a gently rolling upland region in central Bohemia. Its geological base consists of Cretaceous sediments, mainly sandy-calcareous mudstones, which shape the soil composition and, in turn, the vegetation that can take root here. The reserve itself is forested, with a defining feature being its steep, southeast-facing slope — an orientation that provides the light and warmth necessary for the site's characteristic heat-loving flora.

What else is worth knowing about the surroundings?

The name "Ostrov" (meaning "island" in Czech) refers to the earthwork remains of a former hillfort and a medieval village located nearby, close to the settlement of Jedomělice. While these historical traces are not the reason for the site's nature protection status, they add context to the landscape, showing that the area was inhabited and used by people as far back as the Middle Ages before nature reclaimed it.

Frequently asked questions

When was the Ostrov u Jedomělic reserve established? The protected area was declared in 1987, and in 2016 it was additionally included in the Natura 2000 network.

What is the main reason for protecting this site? Primarily the presence of white dittany (Dictamnus albus) along with accompanying thermophilic flora such as bastard balm and purple gromwell.

Where exactly is the reserve located? In the municipality of Jedomělice, in the Kladno district, within the Džbán Nature Park in central Bohemia.

Are there traces of past settlement in the reserve? Yes, remains of a hillfort and a medieval village survive nearby, and the name "Ostrov" most likely derives from them.

What does the terrain of the reserve look like? A forested, steep slope facing southeast, sitting on a geological base of sandy-calcareous Cretaceous mudstones.