Shrub of the Berberidaceae family, this subspecies is a regional form of Berberis vulgaris, the common barberry, endemic to the Cantabrian Range, in northern Spain. It occupies rocky slopes, limestone screes, moors, and edges of open forests, at altitudes between approximately 800 and 2,000 meters, in an Atlantic mountain climate with harsh winters and relatively cool summers.
It forms a thorny, branched, and deciduous bush, generally between 1 and 2 meters high, with grayish branches armed with trifoliate spines. The leaves, grouped in rosettes on short branches, are obovate, medium green, with finely denticulate-spinescent edges, taking on beautiful orange to bright red hues in autumn.
The bright yellow flowers are gathered in fragrant hanging clusters that enliven the branches in spring. They give way to oblong, scarlet red berries at maturity, slightly frosted, with a pronounced acidity; they were once used in confectionery and folk medicine in the Cantabrian regions.
In its natural habitat, its flowering extends from April to June depending on the altitude.
Hardy and calcicolous, this shrub is suitable for large-scale rock gardens, dry slopes, and naturalized compositions. It tolerates summer drought well once established and withstands significant cold.