Perennial of the Fabaceae family, this subspecies is endemic to the southeast of Spain, where it is confined to arid limestone slopes, rocky embankments, and open garrigues of low and medium altitude, in conditions of pronounced summer drought.
It forms spreading bushy clumps, semi-woody at the base, reaching 30 to 50 cm in height. The foliage is composed of small imparipinnate leaflets, gray-green, arranged in dense basal rosettes from which numerous slender, upright flowering stems arise.
The flowers, with a classic papilionaceous structure, are grouped in loose, upright axillary clusters. Their color varies among individuals, ranging from an intense and bright magenta-pink to a pale almost salmon pink; this variation, observable within the same population, is one of the most striking features of the species in the field. The bright tones contrast sharply with the pale limestone soil and surrounding vegetation.
In its natural habitat, its flowering extends from May to July.
In cultivation, it requires a perfectly drained, limestone or sandy soil, full sun exposure, and copes very well with summer drought. It is rarely cultivated but deserves a place in Mediterranean rock gardens and dry gardens. Moderately hardy.