Diospyros revaughanii | |
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Foliage of Diospyros revaughanii, at Monvert Nature Park | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Ericales |
Family: | Ebenaceae |
Genus: | Diospyros |
Species: | D. revaughanii |
Binomial name | |
Diospyros revaughanii I.Richardson | |
Diospyros revaughanii is a rare species of tree in the family Ebenaceae (ebony).
The tree is one of several species of ebony tree which are endemic to the island of Mauritius, in the western Indian Ocean. [1]
A short, evergreen, shrubby tree, which reaches 4 meters in height. The large, thick leaves have a circular to slightly rectangular shape. They are densely packed along the stems, and attach directly to the tree without any leaf stalks. This is the distinctive feature which can be used to distinguish this tree from the other ebony species of Mauritius.
Like many Mauritian plants, it is heterophyllous and the foliage of juvenile plants is entirely different to that of adult plants. This adaptation is due to the grazing of the (now extinct) giant tortoises of the island. The leaves of young D. revaughanii are therefore longer, thinner, oblong and have petioles (stalks).
Its trunk is thin and it branches from quite low down. Branches and twigs form at an almost perpendicular angle and are quite thick compared to the trunk. The grey bark is often covered in lichens and sometimes even orchids.
Like its relatives, it produces bunches of small, white, fragrant flowers and sweet-smelling, fleshy, sticky, oval fruits (3–5 cm long). [2] [3]
This species is endemic to the island of Mauritius - occurring nowhere else in the world. It was formerly common across the island - especially in the sub-humid and wet forest areas, including lowland forests (where it becomes a tall tree) and swampy areas in the highlands (where it stays shorter). It is now restricted to only a few spots in the south west of Mauritius.
Due to its aesthetic appeal however, it is currently sometimes propagated in Mauritius, as an ornamental landscaping tree, for gardens and public spaces. [4]
Like other species of ebony, this tree yields a dark black ebony wood. Consequently, it was severely exploited for wood and was decimated from much of its former range. It is now a threatened species and only survives in a few spots in the south-west of the island - around Bel Ombre, Mt Lion, and Perrier Nature Reserve - on exposed ridges and wet highland forest where it has escaped felling. The last patches of this tree's habitat are still threatened.
Although it produces large amounts of fruit with fertile seed, these do not often germinate. The fruits were formerly eaten by the island's (now extinct) species of giant tortoise - and possible also by the dodo - which dispersed the seeds. The absence of these natural seed dispersers could be the reason for the poor seed germination in habitat today. [5]
This species is one of eleven surviving species of ebony tree which naturally occur on Mauritius - all of them endemic. Several additional species are now extinct.
The Ebenaceae are a family of flowering plants belonging to order Ericales. The family includes ebony and persimmon among about 768 species of trees and shrubs. It is distributed across the tropical and warmer temperate regions of the world. It is most diverse in the rainforests of Malesia, India, Thailand, tropical Africa and tropical America.
Enterolobium cyclocarpum, commonly known as conacaste, guanacaste, caro caro, devil's ear tree, monkey-ear tree, or elephant-ear tree, is a species of flowering tree in the family Fabaceae, that is native to tropical regions of the Americas, from central Mexico south to northern Brazil (Roraima) and Venezuela. It is known for its large proportions, expansive, often spherical crown, and curiously shaped seedpods. The abundance of this tree, especially in Guanacaste Province, Costa Rica, where it is prized for the shady relief it provides from the intense sun, coupled with its immensity, have made it a widely recognized species. It is the national tree of Costa Rica.
Diospyros melanoxylon, the Coromandel ebony or East Indian ebony, is a species of flowering tree in the family Ebenaceae native to India and Sri Lanka; it has a hard, dry bark. Its common name derives from Coromandel, the coast of southeastern India. Locally it is known as temburini or by its Hindi name tendu. In Odisha, Jharkhand, and Assam, it is known as kendu. In Andhra Pradesh, and Telangana it is known as tuniki. The leaves can be wrapped around tobacco to create the Indian beedi, which has outsold conventional cigarettes in India. The olive-green fruit of the tree is edible.
Diospyros mespiliformis, the jackalberry, is a large dioecious evergreen tree found mostly in the savannas of Africa. Jackals are fond of the fruit, hence the common names. It is a member of the family Ebenaceae, and is related to the true ebony and edible persimmon.
Hibiscadelphus distans is an extremely rare species of flowering plant in the mallow family, Malvaceae, that is endemic to the island of Kauaʻi in Hawaii. It is known as hau kuahiwi in Hawaiian, which means "upland Hibiscus tiliaceus." It is a bush or small tree with heart-shaped leaves and yellow flowers and grows at between 1,000 and 1,800 feet in the remnants of native dry forests. Despite its rarity, it is believed to be the only surviving species in the genus Hibiscadelphus which is only known from Hawaii, the other five species having recently become extinct in the wild, some being known from only a single plant.
Carya glabra, the pignut hickory, is a common, but not abundant species of hickory in the oak-hickory forest association in the Eastern United States and Canada. Other common names are pignut, sweet pignut, coast pignut hickory, smoothbark hickory, swamp hickory, and broom hickory. The pear-shaped nut ripens in September and October, has a sweet maple like smell, and is an important part of the diet of many wild animals. The wood is used for a variety of products, including fuel for home heating. Its leaves turn yellow in the Fall.
The wildlife of Mauritius consists of its flora and fauna. Mauritius is located in the Indian Ocean to the east of Madagascar. Due to its isolation, it has a relatively low diversity of wildlife; however, a high proportion of these are endemic species occurring nowhere else in the world. Many of these are now threatened with extinction because of human activities including habitat destruction and the introduction of non-native species. Some have already become extinct, most famously the dodo which disappeared in the 17th century.
Hyophorbe vaughanii is a species of flowering plant in the family Arecaceae that is endemic to Mauritius. Its natural habitat is subtropical or tropical dry forests.
Arctostaphylos confertiflora is a rare species of manzanita known by the common name Santa Rosa Island manzanita. This shrub is endemic to California, where it grows on the sandstone bluffs of Santa Rosa Island in the Channel Islands. This manzanita is listed as an endangered species by the United States Government.
Diospyros sandwicensis is a species of flowering tree in the ebony family, Ebenaceae, that is endemic to Hawaii. It belongs to the same genus as both persimmons and ebony. Its common name, lama, also means enlightenment in Hawaiian. Lama is a small to medium-sized tree, with a height of 6–12 m (20–39 ft) and a trunk diameter of 0.3 m (0.98 ft). It can be found in dry, coastal mesic, mixed mesic, and wet forests at elevations of 5–1,220 m (16–4,003 ft) on all major islands. Lama and olopua are dominant species in lowland dry forests on the islands of Maui, Molokaʻi, Kahoʻolawe, and Lānaʻi.
Diospyros mabacea, the red-fruited ebony is a rare rainforest tree in the ebony or persimmon family growing in north eastern New South Wales. Listed as endangered by extinction.
Diospyros candolleana, is a tree in the Ebony family, endemic to the Western Ghats of India and Sri Lanka. The trees are usually 20m tall, and found as subcanopy trees in wet evergreen forests up to 90m.
Bras d'Eau National Park is one of only three national parks in Mauritius. It is located in the north-east of the island.
Cyphostemma mappia is a species of caudiciform succulent plant endemic to Mauritius. It is sometimes known as the "Mauritian baobab", though it is member of the grape family (Vitaceae) and unrelated to the true Baobabs of Africa.
Diospyros tessellaria is a species of tree in the family Ebenaceae.
Sideroxylon puberulum, or manglier rouge, is a species of plant in the family Sapotaceae. It is endemic to Mauritius.
Ile aux Aigrettes is an islet off the south-east coast of Mauritius. It functions as a nature reserve and a scientific research station. It is also a popular visitors attraction — both for tourists and for Mauritians.
Diospyros egrettarum is a species of tree endemic to Mauritius and was once a dominant species throughout dry and coastal forests. Due to harvests for timber and firewood in the past the species was reduced to fewer than 10 individuals on the main land. The only viable population remained on Île aux Aigrettes, a coral island off the east coast, where it was able to survive thanks to protective measures, such as the eradication of exotic plants and rats. The tree is named after this Island.
Diospyros leucomelas is a species of tree endemic to Mauritius.
Diospyros paniculata, or the panicle-flowered ebony, is a species of tree in the ebony family. Endemic to the Western Ghats area of India and parts of Bangladesh, the species is currently listed as Vulnerable in the IUCN Red List.