The site is characterized by a mosaic of 17 plant communities regrouped into three main types of ecological units: grassy open areas, shrubby areas and wooded areas.
Of these, three are listed in the Habitats Directive.
The calcareous rocky slopes with chasmophytic vegetation Cystopterido fragilis-Asplenietum scolopendrii are considered as exceptional, with a degree of uncertainty in the Nord-Pas-de-Calais region.
Hydrophilous tall herb fringe community with Petasites hybridus, at the limit of its range, is also exceptional.
The herbaceous fringe with red campion (Silene dioica) et wood forget-me-not (Myosotis sylvatica) (Sileno dioicae - Myosotidetum sylvaticae) is very rare in the Nord-Pas-de-Calais.
The wood-fringe Lathyro sylvestris – Astragaletum glycyphylli is also regionally interesting.
The site is characterized by a mosaic of 17 plant communities regrouped into three main types of ecological units: grassy open areas, shrubby areas and wooded areas. Of these, three are listed in the Habitats Directive. The calcareous rocky slopes with chasmophytic vegetation Cystopterido fragilis-Asplenietum scolopendrii are considered as exceptional, with a degree of uncertainty in the Nord-Pas-de-Calais region. Hydrophilous tall herb fringe community with Petasites hybridus, at the limit of its range, is also exceptional. The herbaceous fringe with red campion (Silene dioica) et wood forget-me-not (Myosotis sylvatica) (Sileno dioicae - Myosotidetum sylvaticae) is very rare in the Nord-Pas-de-Calais. The wood-fringe Lathyro sylvestris – Astragaletum glycyphylli is also regionally interesting.
Carrière des Nerviens Regional Nature Reserve