Macadamia is a genus of four species of trees in the flowering plant family Proteaceae. They are indigenous to Australia, native to northeastern New South Wales and central and southeastern Queensland specifically. Two species of the genus are commercially important for their fruit, the macadamia nut. Global production in 2015 was 160,000 tonnes. Other names include Queensland nut, bush nut, maroochi nut, bauple nut and Hawaii nut. In Australian Aboriginal languages, the fruit is known by names such as bauple, gyndl or jindilli and boombera. It was an important source of bushfood for the Aboriginal peoples who are the original inhabitants of the area.
Athertonia is a genus of tall trees, constituting part of the plant family Proteaceae. It is a monotypic taxon, and the sole described species is Athertonia diversifolia, commonly known as Atherton oak. It is a small to medium-sized tree and is endemic to restricted tablelands and mountainous regions of the wet tropics rain forests of north-eastern Queensland, Australia, where it is widespread. For example, it grows in the Atherton Tableland region with which it shares its name, from the colonial pastoralist John Atherton (1837–1913). Its closest relatives are Heliciopsis and Virotia. A relative of the macadamia, it has potential as an ornamental tree and has an edible nut.
The Grevilleoideae are a subfamily of the flowering plant family Proteaceae. Mainly restricted to the Southern Hemisphere, it contains around 46 genera and about 950 species. Genera include Banksia, Grevillea, and Macadamia.
Triunia is a genus of medium to tall shrubs or small trees found as understorey plants in rainforests of eastern Australia. Members of the plant family Proteaceae, they are notable for their poisonous fleshy fruits or drupes. Only one species, T. youngiana, is commonly seen in cultivation.
Helicia is a genus of 110 species of trees and shrubs, constituting part of the plant family Proteaceae. They grow naturally in rainforests throughout tropical South and Southeast Asia, including India, Sri Lanka, Indochina, Peninsular Malaysia to New Guinea and as far south as New South Wales.
Heliciopsis montana is a species of plant in the family Proteaceae. It is a tree endemic to Peninsular Malaysia. It is threatened by habitat loss. The Latin specific epithet montana refers to mountains or coming from mountains.
Heliciopsis rufidula is a species of plant in the family Proteaceae. It is a tree found in Peninsular Malaysia and Borneo. It is threatened by habitat loss.
Virotia is a genus of six species of flowering plants in the family Proteaceae. The genus is endemic to New Caledonia with six species that were once placed in Macadamia. Its closest relatives are the Australian Athertonia and the Asian Heliciopsis. The genus is named after Robert Virot, pioneer of ecological studies in New Caledonia and author of a monograph of New Caledonian Proteaceae.
Catalepidia is a genus of a sole described species of medium-sized trees, constituting part of the plant family Proteaceae. The species Catalepidia heyana grows naturally only in a restricted mountain region (endemic) of the wet tropics rain forests of north-eastern Queensland, Australia. Common names include Hey's nut or Hey's nut oak.
Lasjia is a genus of five species of trees of the family Proteaceae. Three species grow naturally in northeastern Queensland, Australia and two species in Sulawesi, Indonesia. Descriptively they are the tropical or northern macadamia trees group. Lasjia species characteristically branched compound inflorescences differentiate them from the Macadamia species, of Australia, which have characteristically unbranched compound inflorescences and only grow naturally about 1,000 km (620 mi) further to the south, in southern and central eastern Queensland and in northeastern New South Wales.
Helicia attenuata is a plant in the family Proteaceae. The specific epithet attenuata means "drawn out", referring to the leaf base.
Helicia excelsa is a plant in the family Proteaceae. It grows as a tree up to 20 metres (70 ft) tall, with a trunk diameter of up to 25 centimetres (10 in). The bark is dark grey to blackish. Inflorescences bear up to three reddish brown flowers. Fruit is black, ellipsoid, up to 3 centimetres (1 in) long. The specific epithet excelsa is from the Latin meaning "lofty", referring to the tree's growth. Habitat is forests from sea level to 1,700 metres (5,600 ft) altitude. H. excelsa is found in Bangladesh, Burma, Thailand, Malaysia and Indonesia.
Helicia fuscotomentosa is a plant in the family Proteaceae. It grows as a tree up to 25 metres (80 ft) tall, with a trunk diameter of up to 30 centimetres (12 in). The bark is mottled grey and black. The flowers are reddish brown. Its habitat is forests from sea level to 2,000 metres (6,600 ft) altitude. H. fuscotomentosa is endemic to Borneo.
Helicia maxwelliana is a plant in the family Proteaceae. It grows as a treelet up to 3 metres (10 ft) tall. The twigs are dark brown. The flowers are reddish brown. The fruit is black, round, up to 2.5 centimetres (1 in) in diameter. Its habitat is montane forest at 1,600 metres (5,200 ft) to 1,700 metres (5,600 ft) altitude. H. maxwelliana is endemic to Borneo.
Helicia petiolaris is a plant in the family Proteaceae. The specific epithet petiolaris means "stalked", referring to the leaves.
Helicia pterygota is a plant in the family Proteaceae. It grows as a shrub or small tree up to 7 metres (20 ft) tall, with a stem diameter of up to 6 centimetres (2 in). The bark is brownish. The specific epithet pterygota is from the Greek meaning "winged", referring to the pedicel. Habitat is forests from 1,000 metres (3,300 ft) to 1,800 metres (6,000 ft) altitude. H. pterygota is endemic to Borneo where it is confined to Mount Kinabalu in Sabah.
Heliciopsis velutina is a species of trees, in the family Proteaceae. They grow up to 25 metres (80 ft) tall, with a trunk diameter of up to 25 cm (10 in). The bark is dark brown. They have reddish brown flowers. They have brown, ellipsoid fruits up to 4 cm (2 in) long. The specific epithet velutina comes from the Latin meaning "velvety", referring to the petiole. They grow naturally in lowland mixed dipterocarp forests' habitats from sea level to 600 metres (2,000 ft) altitude in Peninsular Malaysia and Borneo.
Diospyros ridleyi is a tree in the family Ebenaceae. It grows up to 30 metres (100 ft) tall. Twigs are reddish brown when young. Inflorescences bear up to three flowers. The fruits are round to ovoid, up to 5 cm (2 in) in diameter. The tree is named for the English botanist Henry Nicholas Ridley. Habitat is mainly lowland mixed dipterocarp forests. D. ridleyi is found in India, Peninsular Malaysia and Borneo.
Diospyros singaporensis is a tree in the family Ebenaceae. It grows up to 28 metres (90 ft) tall. Inflorescences bear up to three flowers. The fruits are round, shiny black, up to 3.5 cm (1 in) long. The tree is named after Singapore. Habitat is lowland mixed dipterocarp forests. D. singaporensis is found in Peninsular Malaysia and Borneo.
Helicia nilagirica is a tree of the Proteaceae family. It grows from Thailand across Mainland Southeast Asia to Yunnan, Zhōngguó/China and over to Nepal. It is a source of wood, a pioneer reafforestation taxa, and an ethnomedicinal plant.
