Shrub formations characteristic of the thermo-Mediterranean zone. Included here are those formations, for the most part indifferent to the siliceous or calcareous nature of the substrate, that reach their greatest extent or optimal development in the thermo-Mediterranean zone, typically with abundant Pistacia lentiscus, Myrtus communis, Phillyrea spp., Erica manipuliflora, Styrax officinalis, Genista fasselata, Euphorbia dendroides, Calicotome villosa and Sarcopoterium spinosum. Also included are the numerous, strongly characterized, thermophile formations endemic to the south of the Iberian peninsula, mostly thermo-Mediterranean but sometimes meso-Mediterranean; in their great local diversity they are a western counterpart of, and sometimes approach in appearance, the mostly eastern Mediterranean phryganas F7.