African Tulip Tree

Spathodea campanulata is native to tropical West and Central Africa.

• Native range extends from Senegal and Guinea in the west through Cameroon, the Central African Republic, and the Democratic Republic of Congo to Uganda and western Kenya
• Found naturally in tropical moist and semi-deciduous forests, forest margins, and along watercourses
• Occurs at elevations from sea level to approximately 1,200 meters
• First described scientifically by Palisot de Beauvois in 1805
• Introduced to tropical botanical gardens worldwide during the 19th century and rapidly became a popular ornamental
• Now naturalized and invasive in many tropical regions including Hawaii, Fiji, Samoa, Australia (Queensland), Mauritius, Réunion, Sri Lanka, India, the Caribbean, Central America, and parts of South America
• In Hawaii, it is one of the most problematic invasive trees, threatening native rainforest ecosystems
• In Australia, it is a declared weed in Queensland
• The tree was spread intentionally as an ornamental and unintentionally through seed dispersal by wind and water
• In its native Africa, it is a valued component of the forest ecosystem and is not invasive

Spathodea campanulata is a large, fast-growing, briefly deciduous tree with spectacular flowers.

Size and habit:
• Typically grows 15 to 25 meters tall, occasionally reaching 30 meters
• Crown is dense, broadly rounded to umbrella-shaped
• Trunk is 30 to 80 cm in diameter, with smooth, grayish-brown bark
• Branches are thick, spreading, forming a substantial canopy

Leaves:
• Large, pinnately compound, 30 to 60 cm long, with 7 to 17 opposite leaflets
• Leaflets are broadly elliptical to ovate, 8 to 18 cm long and 4 to 8 cm wide
• Dark green, glossy, leathery, with entire margins
• Impressively pinnate venation visible on the lower surface

Flowers:
• Large, showy, tulip-shaped (campanulate), 8 to 12 cm long and 6 to 10 cm across
• Brilliant orange-red to vermilion, with a yellowish-orange to crinkled edge on the upper petal
• Flowers are borne in large, terminal, upright racemes or panicles
• Unopened buds are enclosed in a brown, boat-shaped spathe that splits to release the flowers
• Buds hold water — when squeezed, they shoot a jet of water
• Blooming can occur year-round in equatorial regions, peaking during the dry season

Fruit:
• Large, elongated, capsule-like pods 15 to 25 cm long
• Pods split open when mature, releasing hundreds of flat, winged, papery seeds
• Seeds are wind-dispersed over considerable distances

Spathodea campanulata has a dual ecological identity — a valued native species in Africa and a destructive invader elsewhere.

Native habitat:
• Tropical moist and semi-deciduous forests of West and Central Africa
• Often found in forest gaps, along riverbanks, and in disturbed forest margins
• Occurs as a pioneer species, colonizing disturbed sites

Invasive behavior:
• In introduced ranges, it aggressively colonizes disturbed areas, forest gaps, roadsides, and riparian zones
• Produces enormous quantities of wind-dispersed seeds that can travel hundreds of meters
• Forms dense thickets that shade out native understory vegetation
• Capable of regenerating from root suckers, making control difficult
• In Hawaii, it has invaded native rainforests, forming monospecific stands that displace native Metrosideros ('ohi'a) forests
• The nectar-rich flowers attract birds that may neglect native plant species
• Reproductive capacity is enormous — a single tree can produce millions of seeds per year

Ecological role in native range:
• Flowers are pollinated by sunbirds, bees, and butterflies
• Provides food for nectar-feeding birds and insects
• Used as a nesting tree by various bird species

Not threatened in its native African range, but aggressively invasive in many tropical regions where it has been introduced.

• Listed in the IUCN's "100 of the World's Worst Invasive Alien Species"
• Active eradication programs exist in Hawaii, Fiji, and Australia
• In Hawaii, biological control research is ongoing but complicated by the tree's ornamental value
• Some countries restrict importation and sale of the species
• In its native Africa, populations are stable and not of conservation concern
• Conservation of native tropical forests in Hawaii and the Pacific is threatened by African Tulip Tree invasion
• Public education campaigns discourage further planting in vulnerable island ecosystems

Planting:
• Propagation from seed, which germinates readily in 1 to 2 weeks without pretreatment
• Also propagates from root suckers and cuttings
• Extremely fast-growing — can reach 3 to 5 meters in the first year
• Plant in full sun in well-drained, fertile soil
• Adaptable to a range of soil types
• Hardy in USDA zones 10 to 12
• Requires tropical warmth — damaged by temperatures below 5°C
• Drought-tolerant once established
• Prune to maintain shape and control size
• WARNING: Highly invasive in many tropical regions — check local regulations and avoid planting near natural areas
• Not recommended for Hawaii, Fiji, Queensland, or other areas where it is invasive
• Consider native alternatives for ornamental planting in tropical regions
• Where appropriately planted (in its native range or urban settings far from natural areas), it requires minimal maintenance

Uses:
• One of the most spectacular ornamental trees in the tropics — valued for its fiery orange-red floral display
• Widely planted as a street tree and park tree in tropical cities across Africa, India, Southeast Asia, and the Caribbean
• Bark is used in traditional African medicine to treat skin diseases, fever, and gastrointestinal complaints
• Leaves are used in traditional medicine for wound healing and as an anti-inflammatory
• Flowers are used in traditional African medicine and cultural ceremonies
• The water held in unopened flower buds is used as a traditional eye wash in parts of Africa
• Wood is soft and used for making bowls, carvings, and drums in West Africa
• The tree provides shade and ornamental value in urban tropical landscapes
• In some West African traditions, the tree is planted at the birth of a child as a symbol of vitality and growth
• Nectar from the flowers is consumed by sunbirds and can be used as an emergency water source
• The tree has cultural significance in many West African societies as a marker of important places
• Despite its invasiveness, it remains one of the most commonly planted ornamental trees in tropical cities worldwide