Cytisus oromediterraneus, the Pyrenean broom, is a shrub species that belongs to the family Fabaceae.

Forms extensive shrublands, alone or coexisting with other shrubs, such as the creeping juniper (Juniperus communis subsp.

The leaves fall early so the stems are often bare; the lower ones are trifoliate, without petiole; the floral ones are simple and also seated.

The fruit is a legume of 15 to 30 mm, straight or somewhat curved, very compressed laterally and covered with hairs applied to its surface.

[2] Cytisus oromediterraneus dominates the vegetation of the oromediterranean floor in Gredos, it can cover the highest north-facing slopes of the supramediterranean; in fact, from some points of Gredos, such as the road leading to the platform, it can be clearly seen how the north-facing slopes are covered by the Pyrenean broom, while those facing south are inhabited by the hiniesta and/or the white broom.

[3] The clearings of piornales are mainly occupied by various herbs and shrubs, among which we highlight the attractive viborera salmantina (Echium salmanticum).

Boraginaceae, endemic to the western half of the mountain range, the ortegia (Ortegia hispanica, caryophilic), the lavender (Lavandula pedunculata, Lamiaceae), the thyme (Santolina rosmarinifolia, Asteraceae), the aster with rice leaves (Aster sedifolius, Asteraceae) and the pink-flowered foxglove (Digitalis thapsi, Plantaginaceae), species that also mostly inhabit the cleared thickets of the oak forest floor and can ascend the sunny slopes to reach the Pyrenean broom.

[3] The appearance it presents is often cushioned to defend itself from the cold and the strong winds that blow at high altitudes.

In the flowering season it tinges yellow many of the Spanish mountain ranges and gives off an intense and cloying smell similar to that of honey.