Acacia farnesiana (L.) Willd.

Sweet acacia, needle bush, vachellia farnesiana, mimosa farnesiana
Acacia_farnesiana_01 Acacia_farnesiana_02 Acacia_farnesiana_03

Description 1

Shrub up to 5 m (generally no larger than 2.5 m in the Canary Islands), highly branched. Light brown bark and branches with large, clear thorns. 2-5 cm sized biparipinnate leaves, with 2-6 pairs of pinnas with 10-30 pairs of leaflets each (of 3-5 x 1-3 mm). Axillary flowers or clusters, which are yellow in colour, have a diameter of 1 cm and are scented. Brown, cylindrical, slightly flattened legumes with greenish-brown seeds.

Biology 1

Reproduction by seeds which are dispersed a short distance by abiotic means (gravity, surface water). There is no data on the possible zoochorous dispersion in the Canary Islands. They are dispersed medium and long distances by plant and earth transport and perhaps by surrounding traffic. They grow up to 1 m in the first year. Fruit bearing in the summer.

Habitat 1

Wooded environments near to agriculture, gardens and dump sites. They also inhabit in areas of xerophyte bushland, ravines and streams and temporary water courses. They resist arid conditions (100-150mm/year), strong insulation and wind. They tolerate being close to the sea, calcareous soils and lightly brackish waters. They need direct exposure to the sun. Barely any edaphic requirements.

Sources 1

Spanish Catalogue of Exotic Invasive Species, Scholz S., 2008 (data base of species introduced in the Canary Islands, Government of the Autonomous Community of of the Canary Islands, link).

Spanish Catalogue of Exotic Invasive Species - Flora 1

Fuentes y Créditos

  1. Adaptado por INVASORES - administrador de un trabajo de (c) cartotragsatec, algunos derechos reservados (CC BY-SA),

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