![Costus spectabilis (Fenzl) Schumann [as Cadalvena spectabilis Fenzl] Curtis’s Botanical Magazine, vol. 131 [ser. 4, vol. 1]: t. 7992 (1905) [M. Smith]](https://upload.wikimedia.org/wikipedia/commons/0/06/Costus_spectabilis00.jpg)
Costus spectabilis
A bright yellow ground-hugging flower from tropical Africa
Costus spectabilis is a perennial herb with large, soft yellow flowers and paddle-shaped leaves that grow flat against the ground. Native to wooded grasslands across tropical Africa, it is especially known as a symbol of Nigeria, where it appears on the national coat of arms.
- Chosen as the national flower of Nigeria
- Bright yellow flowers open one at a time from the center
- Leaves lie flat on the ground and can have purple-pink edges
- Found in wooded grasslands across tropical Africa
What does Costus spectabilis look like?
This plant forms a low rosette of four broad, fleshy leaves that lie flat on the soil, each leaf about 12 cm across. The leaves are smooth on top and softly hairy underneath, sometimes edged with a hint of purple-pink. Its flowers are large, thin, and bright yellow, with wavy edges and a central petal that stands out. Each bloom opens one at a time from the center of the leaf rosette and lasts only briefly, but new flowers quickly follow.
Where does Costus spectabilis come from?
Costus spectabilis grows wild throughout much of tropical Africa, from West Africa through Central and East Africa down to Zimbabwe and Angola. It thrives in wooded grasslands and open woodlands, sometimes near rocks or termite mounds. The plant is part of the Costaceae family, which is closely related to ginger and includes species from several continents. Its underground stems, or rhizomes, help it survive dry seasons by going dormant.
When and how Costus spectabilis blooms
In spring, new paddle-shaped leaves emerge from the rhizome and spread flat against the ground. The plant prefers moist, humid environments and shade, but some can tolerate more sun. Flowers appear from the center of the leaf rosette, each one opening singly and quickly replaced by the next. After flowering, the plant retreats to its rhizome during the dry or cool months.
![Costus spectabilis (Fenzl) Schumann [as Cadalvena spectabilis Fenzl] Curtis’s Botanical Magazine, vol. 131 [ser. 4, vol. 1]: t. 7992 (1905) [M. Smith]](https://upload.wikimedia.org/wikipedia/commons/2/22/Costus_spectabilis00%2C_white_background.jpg)
How Costus spectabilis is used
Costus spectabilis is valued as a groundcover in gardens for its striking yellow flowers and unusual leaf arrangement. In Nigeria, it is a national symbol and features on the country's coat of arms. The plant has also appeared in cultural works, such as being chosen to represent Nigeria in a royal wedding veil design.
Kinds of Costus spectabilis
While Costus spectabilis is the most recognized species for its yellow flowers, the Costaceae family contains over a hundred species found in tropical regions worldwide. These relatives vary in flower color and form, but all share the rhizomatous growth and preference for humid climates.
What Costus spectabilis means
This flower holds special meaning in Nigeria, where it is officially recognized as the national flower and appears on the coat of arms. Its inclusion in a British royal wedding veil as a symbol for Nigeria highlights its cultural significance. Beyond symbolism, it is appreciated for its beauty and unique growth habit.
Questions people ask about Costus spectabilis
Where does Costus spectabilis come from?
It is native to tropical Africa, growing wild from Sierra Leone and Sudan in the north to Angola and Zimbabwe in the south, often in wooded grasslands and open woodlands.
What does Costus spectabilis look like?
The plant forms a low rosette of four large, fleshy leaves that hug the ground. Its flowers are bright yellow, thin, and about 9 cm across, opening one at a time from the center of the rosette.
Why is Costus spectabilis important in Nigeria?
It is the national flower of Nigeria and appears on the country's coat of arms, symbolizing the nation's identity and natural heritage.
When does Costus spectabilis bloom?
It flowers in spring and summer, with each flower opening singly and quickly replaced by another from the center of the leaf rosette.
How is Costus spectabilis used?
It is grown as a groundcover for its attractive flowers and is an important national symbol in Nigeria. It has also been featured in cultural representations, such as a royal wedding veil.
Good reading and sources
- Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
- Where it has been recordedGBIF, Plant database
- Sightings and photos by naturalistsiNaturalist, Plant database
- Costus spectabilis on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Costus spectabilis", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.
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