Sausage Tree
Kigelia africana
The Sausage Tree (Kigelia africana) is one of Africa's most distinctive and conversation-starting trees, instantly recognized by the enormous, sausage-shaped fruits that hang pendulously from long, rope-like stalks throughout the year. These remarkable fruits — which can reach 60 cm in length and weigh up to 10 kg — have made the tree a focal point of African traditional medicine, culture, and ecology for centuries.
• The unmistakable sausage-shaped fruits can grow up to 60 cm long and weigh 5 to 10 kg each, making them among the heaviest fruits of any African tree
• The genus name Kigelia is derived from the Mozambican Bantu name "Kigeli-keia" for this tree
• A single tree can bear 50 to 100 fruits simultaneously at various stages of development
• The flowers open at night and are pollinated primarily by bats, producing a remarkable nocturnal display of deep red, cup-shaped blooms
• Found across most of sub-Saharan Africa, from Senegal to Ethiopia and south to South Africa
Taxonomy
• Found across sub-Saharan Africa from Senegal and Guinea eastward through the Sahel to Ethiopia, Somalia, and down through East Africa to Mozambique, Zimbabwe, and northeastern South Africa (KwaZulu-Natal)
• Also occurs in Madagascar
• Grows in a wide range of habitats including riverine forests, floodplains, savanna woodlands, and gallery forests along watercourses
• Occurs from sea level to approximately 1,800 meters elevation
• Prefers moist, well-drained alluvial soils but tolerates seasonally waterlogged conditions
• The genus Kigelia is monotypic — containing only this single species — placed in the family Bignoniaceae alongside Jacaranda, Catalpa, and Tabebuia
• First described by the French botanist Jean-Baptiste de Lamarck in 1785 as Bignonia africana, later transferred to the genus Kigelia by the German botanist Albrecht Wilhelm Roth in 1821
• The tree has been known to African cultures for millennia, with uses in traditional medicine documented across numerous ethnic groups
• Introduced to tropical regions worldwide as an ornamental, including India, Southeast Asia, Australia, and the Caribbean
Trunk and Bark:
• Reaches 10 to 20 meters (occasionally 25 meters) in height with a trunk diameter of 30 to 100 cm
• Bark gray to grayish-brown, smooth on young trees, becoming rough and fissured with age, sometimes flaking in irregular patches
• Trunk often crooked or leaning, with a characteristically swollen base in some specimens
Crown:
• Wide, rounded to irregular, providing dense shade
• Branches spreading, sometimes pendulous under the weight of fruits
Leaves:
• Odd-pinnate, large, 30 to 60 cm long, with 5 to 9 (sometimes up to 13) leaflets
• Leaflets elliptic to ovate, 7 to 20 cm long and 3 to 8 cm wide, leathery, dark green above, paler beneath
• Margins entire or slightly wavy
• Leaves often clustered toward the ends of branches
Flowers:
• Spectacular, large, deep crimson to maroon-red, tubular-campanulate, 10 to 15 cm long and 8 to 12 cm wide
• Produced on long, pendulous, rope-like peduncles 60 to 200 cm long (sometimes exceeding 3 meters)
• Flowers open at dusk, releasing a musky-sweet scent to attract bat pollinators
• Petals thick, fleshy, velvety-textured on the inside
• Nectar copious and rich, pooling in the flower base
Fruit:
• The iconic sausage-shaped fruit is a massive, indehiscent berry, 30 to 60 cm (occasionally up to 100 cm) long and 8 to 18 cm in diameter
• Gray-brown, hard, and woody when mature, weighing 5 to 10 kg
• Hangs on long, wiry stalks that can persist for months
• Contains numerous small seeds embedded in a fibrous pulp
• Night-blooming flowers are primarily pollinated by fruit bats (Eidolon helvum, Epomophorus spp.), with secondary pollination by sunbirds, honeyeaters, and moths that visit at dusk
• The hanging fruits are browsed by elephants, hippos, giraffes, and various antelope species, which disperse seeds through their dung
• The dense crown provides shade and habitat for birds, epiphytes, and insects
• Riverine specimens help stabilize riverbanks and reduce erosion
• Flowers provide a critical nectar source for bats and nocturnal insects in ecosystems where few other plants bloom at night
• The tree is semi-deciduous, shedding leaves during the dry season and flushing new foliage with the rains
• Fruits that fall into rivers are consumed by fish and crocodiles
• In some areas, the tree acts as a keystone species around which local fauna concentrate activity
• Listed as Least Concern on the IUCN Red List due to its extensive distribution across tropical Africa
• Locally common in suitable habitats, particularly along watercourses
• However, localized threats exist from habitat clearing for agriculture, settlement expansion, and fuelwood harvesting
• The tree's cultural and medicinal importance provides some protection, as communities often preserve specimens near villages
• No specific conservation programs target this species, though it benefits from general forest and wetland conservation efforts
• As an ornamental, it is cultivated in botanical gardens and public spaces worldwide
Fun Fact
The Sausage Tree's fruit is so heavy and hard that falling fruits are a genuine hazard — they can cause serious injury or even death to people and animals standing beneath the tree. In parts of Africa, people are warned not to camp or park cars under Sausage Trees. Ironically, the same dangerous fruits are used in traditional medicine to treat a remarkable range of ailments from skin conditions to rheumatism, and they are fermented to produce a popular local beer in some communities.
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