The greatest diversity of
Ulex species is found in the Atlantic portion of the
Iberian Peninsula, and most species have narrow distribution ranges. The most widespread species is the common gorse (
Ulex europaeus): it is the only species native to much of western Europe, where it grows in sunny sites and usually on dry, sandy soils. It is also the largest species, reaching in height; this compares with typically heights for the western gorse (
Ulex gallii). This latter species is characteristic of highly exposed
Atlantic coastal
heathland and montane habitats. In the eastern part of Great Britain, the dwarf furze (
Ulex minor) replaces the western gorse.
Ulex minor grows to a height of approximately , a
habit characteristic of sandy lowland heathlands., Scotland Common gorse flowers a little in late autumn and through the winter, coming into flower most strongly in spring. Western gorse and dwarf furze flower in late summer (August–September in Ireland and Great Britain). Between the different species, some gorse is nearly always in flower, hence the old country saying: "When gorse is out of blossom, kissing's out of fashion". Gorse flowers have a distinctive coconut-like scent, experienced very strongly by some individuals but only weakly by others.
Species list The genus comprises the following species:
Species names with uncertain taxonomic status The status of the following species is unresolved: •
Ulex eriophorus Gand. •
Ulex spicatus Gand.
Hybrids The following hybrids have been described: •
Ulex ×
breoganii (
Castrov. & Valdés Berm.) Castrov. & Valdés Berm. (
U. europaeus ×
U. gallii) •
Ulex ×
dalilae Capelo, J.C.Costa & Lousã (
U. densus ×
U. jussiaei) •
Ulex ×
lagrezii Rouy (
U. europaeus ×
U. minor) ==Ecology==