Kigelia africana aka Sausagetree

Kigelia africana, or sausage tree, belongs to the Bignoniaceae family. It comes from tropical and southern Africa. Its range runs from Senegal east to Sudan and south to South Africa. It grows along rivers, on floodplains, and in open woodland. It also occurs in savanna and moist forest margins. The species is widespread, with no known threats. Useful Tropical Plants reports its conservation status as Least Concern.

In gardens, this tree reaches about 50–60 feet [15–18.3 metres]. Its spreading crown can reach 75 feet [22.9 metres] across. Some trees reach 75 feet [23 metres] tall beyond that garden range. The stout trunk may bend and branch near the ground. Its smooth, grey-brown bark can flake as it ages. Rough, yellow-green leaves are pinnate, with three to eight leaflets. Sources describe the foliage as evergreen to partly deciduous.

Dark red, bell-shaped flowers hang in long, loose clusters. Each flower has five lobes and a wrinkled surface. The clusters can reach 3–6 feet [0.9–1.8 metres] long. Flowers open at night and hold plenty of nectar. Their strong scent can smell unpleasant. Bats pollinate them, though hawk moths and birds sometimes help. Woody, grey-brown fruits follow, shaped like large sausages. These can reach 2 feet [0.6 metres] in length.

Grow it in full sun or light shade. It needs moist soil that drains well. Regular water gives the best results. Established trees can withstand some drought. Missouri Botanical Garden lists USDA zones 10–12 for this species. It can survive brief cold spells near 28°F. Growth is moderate, as are its listed care needs. Its size makes it a poor choice for indoor tubs. No major insect or disease problems are reported.

In warm regions, gardeners grow it for shade, flowers, and fruit. It also helps hold soil along riverbanks. Falling fruits can injure people and damage cars. Avoid placing parking spaces or tents beneath fruiting trees. The fruit is toxic, even when ripe, and can cause purging. Roasted seeds have served as food during famine. Some traditions also use fruit in beer making. These uses do not make the fruit safe to eat. African herbal medicine uses several parts, most often the fruit. Fruit and roots yield dyes; bark and roots provide tannins.