Inocarpus fagifer | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fabales |
Family: | Fabaceae |
Subfamily: | Faboideae |
Genus: | Inocarpus |
Species: | I. fagifer |
Binomial name | |
Inocarpus fagifer (Parkinson ex Zollinger) Fosberg, 1941 | |
Synonyms | |
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Inocarpus fagifer, commonly known as the Tahitian chestnut or Polynesian chestnut, [1] is a species of flowering plant in the subfamily Faboideae of the legume family, Fabaceae. The tree has a wide range in the tropics of the south-west Pacific and south-east Asian regions, and a history of traditional use by the peoples of Polynesia and Melanesia. It is the only edible and culturally important member of the genus Inocarpus .
There is great diversity in the size, form, shape and colour of the Tahitian chestnut, and of its leaves, flowers and fruit. Because of its long history of cultivation and its tendency to become naturalised where introduced, it is likely that, over its wide range, the species contains several originally farmer-selected cultivars that have not been recognised or described. [2]
The Tahitian chestnut is a medium-sized, evergreen tropical tree. It may grow to 30 m in height, though 20 m is more usual, with a crown diameter of 4–6 m. Mature tree trunks have a typical diameter at breast height of 300 mm, although some grow to a diameter of 900 mm. The trunks are distinctively buttressed at the base and fluted. The branches are arranged spirally, with secondary branching forming a dense network within the canopy. The bark is rough, flaky and brown, becoming greyer with age. From the buttresses a dense network of lateral roots extends through the topsoil around the tree, which has only a shallow taproot. It has a lifespan of 80–90 years. [2]
The dark green leaves are simple, oblong, alternate, and leathery. They are 160–390 mm long and 70–130 mm wide. The petiole is 5 mm long. The apex is pointed and the base lobed, with an entire margin. The veins are opposite and yellow. [2]
The fragrant flowers cluster along a short rachis at the ends of the branches and twigs. About 10 mm long, they have five white to cream or pale yellow petals. Trees begin flowering at 3 to 5 years old, with the flowering season usually taking place in November and December, and fruiting in the following January and February, though this varies through the tree's range and from year to year. [2]
The tree starts bearing fruit at about eight years old. [3] The fruits are slightly flattened, irregularly ovoid, rounded or oblong, and flanged at one end. Produced singly or in clusters, they weigh 50–110 g and are 46–130 mm long, 34–120 mm wide, and 40 mm thick. The smooth skin covers a fibrous shell which holds the kernel. As the fruits ripen their colour changes from green to yellow or orange brown. The mature fruits are usually indehiscent. [2]
The seed is white and kidney-shaped and is contained within the thin brown, fibrous shell. It is relatively large, weighing 5–50 g, 20–70 mm long by 16–40 mm wide. The seed is toxic when raw but edible when cooked. It is perishable, with a short shelf life. The fleshy mesocarp, or pulp, of the fruit is eaten by cockatoos and flying foxes which act as seed dispersal agents. [2]
The Tahitian chestnut grows in the humid lowland tropics with a moderate to high, uniformly distributed or mainly summer rainfall of 1,500–4,300 mm (59–169 in) annually, at altitudes ranging from 0–500 m (0–1,640 ft). It grows in a wide range of soils, including those that are highly calcareous and saline, poorly drained to waterlogged, or those with medium to very low fertility, as well as in mildly acidic to very alkaline coastal soils. [2]
The tree was evidently cultivated more intensively in the past, as it has become extensively naturalised, and is now found mainly in the wild. Its distribution spreads from Malaysia in the west across Melanesia, north-eastern Australia and Micronesia, to the Marquesas of Polynesia in the east. It is commonly found in secondary forest, along the edges of old gardens, riverbanks, in swamps, coastal areas, coconut plantations and mangroves. [2]
The tree has a wide variety of traditional uses, exploiting almost every part of the plant. The leaves and bark have found uses in herbal medicine, in Fiji the ivi leaves also are one of the traditional materials for thatching the bure, fallen branches serve as firewood, green wood is burned to dry copra, and the timber is used for crafts such as carvings and tool handles, as well as for building canoes and for general light construction. [2] Young ivi leaves are used to cover food in the traditional lovo oven. [4]
The fleshy mesocarp is inedible for humans, but the seed kernels serve as an important indigenous food in many island countries in the Pacific. The kernel has a protein content of about 5% and carbohydrate content of 22%, and needs to be cooked to make it edible. Methods of preparation include roasting, grilling, boiling and baking. In Papua New Guinea, the Solomon Islands, Vanuatu, Fiji and in Polynesia the cooked kernels are often mashed into a pudding. [2]
The tree has uses in agroforestry in coastal and soil stabilisation, as an overstorey for crops needing shade, such as cocoa, and as a windbreak. The main products are the edible kernels and the timber. Trees over 25 years old can produce up to 75 kg of fruit a year. [2]
Examples of local folklore about the tree:
Breadfruit is a species of flowering tree in the mulberry and jackfruit family (Moraceae) believed to be a domesticated descendant of Artocarpus camansi originating in New Guinea, the Maluku Islands, and the Philippines. It was initially spread to Oceania via the Austronesian expansion. It was further spread to other tropical regions of the world during the Colonial Era. British and French navigators introduced a few Polynesian seedless varieties to Caribbean islands during the late 18th century. Today it is grown in some 90 countries throughout South and Southeast Asia, the Pacific Ocean, the Caribbean, Central America and Africa. Its name is derived from the texture of the moderately ripe fruit when cooked, similar to freshly baked bread and having a potato-like flavor.
Aleurites moluccanus, the candlenut, is a flowering tree in the spurge family, Euphorbiaceae, also known as candleberry, Indian walnut, kemiri, varnish tree, nuez de la India, buah keras, godou, kukui nut tree, and rata kekuna.
Bactris gasipaes is a species of palm native to the tropical forests of Central and South America. It is well spread in these regions, where it is often cultivated by smallholders in agroforestry systems or more rarely, in monoculture. Common names include peach palm in English, among others used in South American countries. It is a long-lived perennial plant that is productive for 50 to 75 years on average. Its population has an important genetic diversity, leading to numerous fruits, colors, and qualities. The fruits are edible and nutritious but need to be cooked for 30 minutes to five hours. They also benefit many animals in the wild. Peach-palms are also cultivated for the heart of palm, and the trunk can make valuable timber.
Terminalia catappa is a large tropical tree in the leadwood tree family, Combretaceae, native to Asia, Australia, the Pacific, Madagascar and Seychelles. Common names in English include country almond, Indian almond, Malabar almond, sea almond, tropical almond, beach almond and false kamani.
Calophyllum inophyllum is a large evergreen plant, commonly called tamanu, oil-nut, mastwood, beach calophyllum or beautyleaf. It is native to tropical Asia and Wallacea. Due to its importance as a source of timber for the traditional shipbuilding of large outrigger ships, it has been spread in prehistoric times by the migrations of the Austronesian peoples to the islands of Oceania and Madagascar, along with other members of the genus Calophyllum. It has since been naturalized in regions in the East African coast. It is also a source of the culturally important tamanu oil.
Karaka or New Zealand laurel is an evergreen tree of the family Corynocarpaceae endemic to New Zealand. It is common throughout the North and South Islands to Banks Peninsula (43°45′S) and Ōkārito (43°20′S), on the Three Kings Islands, on Raoul Island in the Kermadecs, and on the Chatham Islands. It is widespread in coastal habitats, often forming a major component of coastal forest, though it rarely dominates. Most botanists consider it to be native only to the northern half of the North Island, having been planted elsewhere by Māori near former village sites, and subsequently spread by birds. The common name karaka comes from the Māori language, and is also the Māori term for the colour orange, from the colour of the fruit. In the Chatham Islands, it is called kōpī, its name in the Moriori language. It is naturalised and considered invasive in Hawaii.
Pandanus tectorius is a species of Pandanus (screwpine) that is native to Malesia, Papuasia, eastern Australia, and the Pacific Islands. It grows in the coastal lowlands typically near the edge of the ocean. Common names in English include thatch screwpine, Tahitian screwpine, hala tree and pandanus. The fruit is edible and sometimes known as hala fruit.
Attalea maripa, commonly called maripa palm is a palm native to tropical South America and Trinidad and Tobago. It grows up 35 m (115 ft) tall and can have leaves or fronds 10–12 m (33–39 ft) long. This plant has a yellow edible fruit which is oblong ovoid and cream. An edible oil can be extracted from the pulp of the fruit and from the kernel of the seed.
Grevillea robusta, commonly known as the southern silky oak, silk oak or silky oak, silver oak or Australian silver oak, is a flowering plant in the family Proteaceae, and accordingly unrelated to true oaks, family Fagaceae. Grevillea robusta is a tree, and is the largest species in its genus. It is a native of eastern coastal Australia, growing in riverine, subtropical and dry rainforest environments.
Cordia subcordata is a species of flowering tree in the borage family, it can be found growing in eastern Africa, South Asia, Southeast Asia, northern Australia and the Pacific Islands including Hawaii. The plant is known by a variety of names including kou, beach cordia, sea trumpet, and kerosene wood, among others.
Agathis macrophylla known as Pacific kauri, is a coniferous tree native to the islands of the southwestern Pacific Ocean in tropical humid lowlands and lower montane regions, notably in Fiji, Vanuatu, and the Santa Cruz Islands. The Pacific kauri is one of the largest and fastest growing species in its genus, and is important in forestry.
Spondias dulcis, known commonly as June plum, is a tropical tree, with edible fruit containing a fibrous pit. In the English-speaking Caribbean it is typically known as golden apple and elsewhere in the Caribbean as pommecythere or cythere. In Polynesia it is known as vī.
Dacryodes edulis is a fruit tree in the Burseraceae family native to Africa. Its various regional names include safou, messa, plum (Cameroon), atanga, ube, elumi (Nigeria), African pear, bush pear, African plum, nsafu, bush butter tree, or butterfruit.
Cerbera floribunda, commonly known as cassowary plum, grey milkwood, or rubber tree, is a plant in the family Apocynaceae which is native to the region from Sulawesi to the Solomon Islands, including north east Queensland.
Treculia africana is a tree species in the genus Treculia which can be used as a food plant and for various other traditional uses. The fruits are hard and fibrous, can be the size of a volleyball and weight up to 8.5 kg (19 lb). Chimpanzees have been observed to use tools to break the fruits into small pieces that they can eat. The fruits contain polyphenols.
Artocarpus camansi, the breadnut, is a species of medium-sized tree in the family Moraceae. It is native to New Guinea, the Maluku Islands, and the Philippines. It is the wild ancestor of the breadfruit (Artocarpus altilis) and is also sometimes known as the seeded breadfruit, to distinguish it from its mostly seedless descendant. Breadnut fruits are edible when cooked. The large seeds can also be roasted and eaten.
Cryptophlebia pallifimbriana is a moth of the family Tortricidae. It was described by John David Bradley in 1953. It is found on Fiji, the Austral Islands, the Cook Islands, the Marquesas Islands, New Guinea, the New Hebrides and the Society Islands. It has also been recorded from the Australian state of Queensland.
Flacourtia rukam is a species of flowering plant in the family Salicaceae. It is native to Island Southeast Asia and Melanesia, but has spread into Mainland Southeast Asia, India, and Polynesia. It is also cultivated for its edible fruit. Common names include rukam, governor's plum, Indian plum, and Indian prune.
The karuka is a species of tree in the screwpine family (Pandanaceae) and an important regional food crop in New Guinea. The nuts are more nutritious than coconuts, and are so popular that villagers in the highlands will move their entire households closer to trees for the harvest season.
Canarium indicum, known as galip nut, is a mainly dioecious tree native in eastern Melanesia. It is usually found in rainforests, secondary forests, old garden areas, around villages and settlements. It is also used as a shade tree, as a windbreak and in agroforestry. Canarium is important in the world food system as it can be used as a food and timber source, in traditional medicine, intercropping and agroforestry.