Enterolobium timbouva – Timbouva
Enterolobium timbouva, also known as timbouva, timbaúba, or elephant ear tree, is a magnificent tree from the legume family (Fabaceae), subfamily mimosoideae. It is native to the tropical regions of South America, especially Brazil, where it naturally occurs from the state of Bahia to Rio Grande do Sul. This species was first scientifically described by Carl Friedrich Philipp von Martius.
The tree belongs to the genus Enterolobium, which includes about 12 species of flowering plants native to tropical and warm-temperate regions of America. All species in this genus are medium to large trees, valued both for their ornamental qualities and economic usefulness.
Botanical description and appearance of the plant
Enterolobium timbouva is a deciduous tree with a very wide, dense, and low-set crown, which can reach a height of 10-20 m, and under optimal conditions even up to 35 m. The trunk is short and cylindrical, reaching a diameter of 80-140 cm, making it a valuable source of timber. The tree is characterized by a fast growth rate, especially when young.
The leaves are bipinnate, delicate and very decorative, consisting of 3-7 pairs of pinnae, each with 8-23 pairs of small leaflets. The entire leaves can reach up to 30 cm in length. The flowers are white or light green, small but numerous, gathered in characteristic heads. However, the most recognizable are the thick, curved pods 10-15 cm long, shaped like a human ear, hence the name "elephant ear tree."
Biological cycle and special features
The plant is deciduous, meaning it sheds its leaves during the dry season. The flowering period varies by region and can occur from June to March or from September to November. Fruits mature from May to October. The pods contain saponins, which give them soapy properties but also make them toxic to herbivorous animals.
The tree is a pioneer species with very rapid growth in secondary formations. It also has ecological importance as a honey plant and fodder, although due to the toxicity of the fruits, caution should be exercised when using it as feed.
Temperature tolerance
Enterolobium timbouva is a tropical and subtropical plant that does not tolerate frost. The plant can only survive light frosts down to about -4°C. In the temperate climate zone of Europe, it is not suitable for outdoor cultivation and can only be grown as a potted plant requiring wintering indoors at a positive temperature.
Plant uses
In its natural habitats, timbouva has a wide range of uses. The wood is valued as a building and carpentry material due to its lightness and durability (density about 0.35 g/cm³). The plant is used in forestry as a pioneer species for the regeneration of secondary forests. In landscaping, it is prized for its fast growth and wide crown providing shade, ideal for parks and large spaces.
The bark and leaves have ichthyotoxic properties and were traditionally used for fishing. Pods containing saponins can serve as natural soap, hence some local names like "pau-de-sabão" (soap tree).
Who this species is for
Enterolobium timbouva is a plant for experienced exotic tree enthusiasts who have suitable conditions for wintering tropical plants. Due to its fast growth and large size, it requires spacious rooms or a greenhouse. Ideal for collectors of legume family plants and those interested in cultivating trees with economic and ecological significance.
Summary
Enterolobium timbouva is a fascinating tropical tree with exceptional ornamental and practical qualities. Its distinctive ear-shaped pods, fast growth, and wide crown make it an attractive plant for exotic plant lovers. Although in temperate climates it requires container cultivation with indoor wintering, under suitable conditions it can become a spectacular element of a tropical plant collection.
The plant combines aesthetic qualities with practical importance, representing the richness of neotropical flora. For botany enthusiasts, it is an excellent example of plant adaptation to tropical conditions and their diverse uses by humans in natural habitats.
