Ombu

Ombú, commonly written ombú and scientifically known as Phytolacca dioica, is a large tree native to the pampas of Argentina, Uruguay, and southern Brazil. It is widely planted as an ornamental shade tree in parks and avenues across the region and is closely associated with the rural landscape of southern South America.

The tree is renowned for its distinctive form: a very broad, spreading crown supported by a thick, often bottle-shaped trunk that can store water and may become hollow with age. The bark is smooth and gray; leaves are large, simple, and arranged alternately. Inflorescences are loose panicles of small greenish flowers, and the fruit is a small dark berry. The plant is generally adapted to nutrient-poor soils and can tolerate drought, making it a resilient feature in open landscapes.

Ecology and uses: The ombú is primarily valued for its shade and striking silhouette rather than timber; wood is not used commercially. It can thrive in poor soils and is tolerant of dry conditions, which contributes to its popularity in urban and rural plantings. The berries and other parts of the plant contain toxins, so ingestion can cause illness in humans and animals.

Cultural significance: In Argentina and Uruguay, the ombú holds symbolic value as a emblem of the pampas and rural life, appearing in folklore, poetry, and regional imagery. It is often celebrated as a landmark tree in towns and parks, reflecting its enduring association with the southern South American landscape.