Appearance
It is an evergreen shrub that usually grows to between 30 and 100 cm tall and occasionally up to 2 m tall in the subspecies ''L. stoechas'' subsp. ''luisieri''. Its leaves are 1–4 cm long, greyish and tomentose. The inflorescence is crowned by a mass of purple elongated ovoid bracts about 5 cm long. Lower flowers form a tight rectangular in cross-section. The upper of the five teeth has a wrong-heart-shaped appendage. The crown is blackish-violet, up to 8 mm long and indistinct two-lipped.The flowers, which appear in late spring and early summer, are pink to purple, produced on spikes 2 cm long at the top of slender, leafless stems 10–30 cm long; each flower is subtended by a bract 4–8 mm long. At the top of the spike are a number of much larger, sterile bracts, 10–50 mm long and bright lavender purple . It blooms in spring and early summer, from the month of March in its native habitat, depending on the climate in which it grows.
The Latin specific epithet ''stoechas'' comes from the Greek ''stoichas'' meaning “in rows”. It is also the Greek name for this species.
Naming
The recognised subspecies are:⤷ ''L. stoechas pedunculata'', the common type specific plant, once taxonomically considered ''L. pedunculata''. There is considerable variation in this subspecies, and it may be split into a number of distinct forms. It is native to many coastal regions of the Mediterranean, with some populations on the Atlantic coasts of Morocco and Spain.
⤷ ''L. stoechas luisieri'', which has petals much less interconnected. It is found mainly in Portugal and adjacent regions of Spain.Since its introduction into Australia, it has become an invasive species, widely distributed within the continent. It has been declared a noxious weed in Victoria since 1920. It also is regarded as a weed in parts of Spain.
Uses
''Lavandula stoechas'' is used commercially in air fresheners and insecticides. Flower spikes have been used internally for headaches, irritability, feverish colds and nausea, and externally for wounds, rheumatic pain and as an insect repellent. The lavender also produces essential oils, but is not used commercially for this purpose. The infusion of its dry inflorescences are febrifuge and fight the affections of the chest and bronchi. It is used as antiseptic, digestive, antispasmodic, healing and antibacterial. The flowers are used in aromatherapy, to prepare infusions and essential oils that contain ketones and alcohols.References:
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