Saturday 18 May
Wright's gardenia (Rothmannia annae)
CRITICALLYENDANGERED
Wright's gardenia fact file
- Description
- Biology
- Range
- Habitat
- Status
- Threats
- Conservation
- Find out more
- Glossary
- References
- Print factsheet
Wright's gardenia description
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Rubiales |
| Family | Rubiaceae |
| Genus | Rothmannia (1) |
Wright's gardenia (Rothmannia annae) is viewed by some as one of the most beautiful of the Seychelles trees. It is small with smooth, greyish-green bark and acutely pointed, dark-green leaves (2), which may reach 12 cm long (4). The white flowers are speckled with deep red and have a strong, heady scent (2). Fruits are olive-green rounded berries; they may be up to 6 cm long and contain many seeds (2).
- Size
- Height: up to 6 m (2)
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Related species
Wright's gardenia biology
After periods of heavy rain, all the trees in the area will produce their strongly-scented white flowers (2). These only persist for a few days but flowering will continue throughout the rainy season that runs from October to May (2).
TopWright's gardenia range
Endemic to the Seychelles, naturally occurring populations today exist only on the island of Aride, the most northerly member of the archipelago (2).
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Species with a similar range
Wright's gardenia habitat
Known from seven sites on the island of Aride, which vary in height from the plateau a few metres above sea level to the mountain's summit (2).
TopWright's gardenia status
Wright's gardenia is classified as Critically Endangered on the IUCN Red List (1).
Wright's gardenia threats
Wright's gardenia is restricted to one single population on Aride Island in the Seychelles. Other nearby populations have become extinct for unknown reasons, which could also affect the only remaining population. Although the reason for local extinction is unknown, it is thought that introduced pests may have been the cause, as well as competition with Pisonia grandis. The highly restricted range of Wright’s gardenia makes it particularly vulnerable to extinction (1).
TopWright's gardenia conservation
The island of Aride is a Special Reserve (1) and has been the focus of a long-running habitat restoration programme carried out by the Royal Society for Nature Conservation, which involves the removal of introduced plants such as coconut palms (3). Almost all non-native trees have been removed, and endemics such as Wright's gardenia have been planted and are showing encouraging sings of recovery (3). Stands of Wright's gardenia have also been planted on the islands of Fregate and Silhouette; the first wild germination on an island other than Aride for over 100 years has recently occurred on Fregate (3). Careful monitoring and management of these populations are required, but the future of this beautiful tree now appears more secure thanks to concerted conservation efforts in the Seychelles.
TopFind out more
To learn more about conservation in the Seychelles visit:
-
The Nature Protection Trust of Seychelles:
http://islandbiodiversity.com
Authentication
Authenticated (6/5/03) by Justin Gerlach. Scientific Co-ordinator, The Nature Protection Trust of Seychelles.
http://islandbiodiversity.com
Glossary
- Endemic
- A species or taxonomic group that is only found in one particular country or geographic area.
References
-
IUCN Red List (December, 2011)
http://www.iucnredlist.org - Wise, R. (1998) A Fragile Eden. Princeton University Press, New Jersey.
- Robertson, S.A. (1989) Flowering Plants of the Seychelles. Royal Botanic Gardens, Kew.
- Gerlach, J. (2003) Restoring habitats in the Seychelles. Plant Talk, 31: 6 - 8.
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Image credit
Wright's gardenia flower
© Christopher Kaiser-Bunbury
Christopher Kaiser-Bunbury
c.kaiser-bunbury@biology.au.dk
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