Cytisus decumbens (southern Europe)
Habit: Prostrate, extended dwarf shrub, 0.2-0.5 m tall and wide; twigs pressed to the ground, very slow-growing.
Flowers: Large, golden yellow butterfly flowers, plentiful, May.
Leaves: Small, elongated, dark green, no autumn colours.
Demands: Sun, tolerates heat, frost hardy.
Soil: Well drained substrates, neutral to alkaline, dry to fresh.
Hardiness: Zone 5a