Genisteae

Genisteae is a tribe of trees, shrubs and herbaceous plants in the subfamily Faboideae of the family Fabaceae.

The tribe's greatest diversity is in the Mediterranean, and most genera are native to Europe, Africa, the Canary Islands, India and southwest Asia.

[7][8][9] The tribe does not currently have a node-based definition, but several morphological synapomorphies have been identified: … bilabiate calyces with a bifid upper lip and a trifid lower lip, … the lack of an aril, or the presence of an aril but on the short side of the seed, and stamen filaments fused in a closed tube with markedly dimorphic anthers … and presence of α-pyridone alkaloids.

They are widely used as ornamental landscape plants and also for wasteland reclamation (e.g. mine tailings) and sand dune stabilising.

Tagasaste (Chamaecytisus proliferus), a Canary Islands native, is widely grown as sheep fodder.

On the east and west coasts of North America, common broom (Cytisus scoparius) was introduced as an ornamental plant (e.g.:California since the 1860s).

[14] It has become a naturalised invasive weed, and due to its aggressive seed dispersal broom removal has proved very difficult.

Cytisus scoparius , Common Broom. 1. Two-lipped calyx. 2. Broadly ovate vexillum or standard. 3. One of the alae or wings of the corolla. 4. Carina or keel. 5. Monadelphous stamens. 6. Hairy ovary with the long style, thickened upwards, and spirally curved. 7. Legume or pod.
brooms in spring at Fondachelli-Fantina , Sicily
Broom (plant)