| Potoxylon | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Laurales |
| Family: | Lauraceae |
| Genus: | Potoxylon Kosterm. |
| Species: | P. melagangai |
| Binomial name | |
| Potoxylon melagangai | |
| Synonyms [2] | |
Eusideroxylon melagangaiSymington | |
Potoxylon is a monotypic genus of evergreen trees belonging to the Laurel family, Lauraceae. Its only species, Potoxylon melagangai, [3] is endemic to Borneo.
Potoxylon melagangai is an evergreen tree which grows up to 25 metres tall. [1] It has gray bark. Leaves are alternate, simple, leathery, with entire margins and pinnate venation. The inflorescences are grouped in axillary spikes. The flowers are bisexual and actinomorphic with six tepals in two whorls, 9 stamens in three whorls, the ovary superior and unilocular. The fruit, a berry-like drupe, is ellipsoid and dispersed by birds.
Potoxylon melagangai is endemic to Borneo, where it is known from western Sabah and northern Sarawak (Malaysia), Brunei, and East Kalimantan (Indonesia). [1]
It grows in lowland rain forests from 400 to 625 metres elevation. [1]
Phylogenetic analysis shows that Potoxylon diverged early from other Lauraceae. [4] Potoxylon, like the related genus Eusideroxylon , has an evolutionary history that is difficult to resolve because of the complex geological history of its native range, which has components from both the Gondwanan and Laurasian supercontinents, and consequently it is unclear whether Potoxylon evolved on Gondwana.
Lauraceae, or the laurels, is a plant family that includes the true laurel and its closest relatives. This family comprises about 2850 known species in about 45 genera worldwide. They are dicotyledons, and occur mainly in warm temperate and tropical regions, especially Southeast Asia and South America. Many are aromatic evergreen trees or shrubs, but some, such as Sassafras, are deciduous, or include both deciduous and evergreen trees and shrubs, especially in tropical and temperate climates. The genus Cassytha is unique in the Lauraceae in that its members are parasitic vines. Most laurels are highly poisonous.
Cryptocarya is a genus of evergreen trees belonging to the laurel family, Lauraceae. The genus includes more than 350 species, distributed through the Neotropical, Afrotropical, Indomalayan, and Australasian realms.
Phoebe is a genus of evergreen trees and shrubs belonging to the Laurel family, Lauraceae. There are 75 accepted species in the genus, distributed in tropical and subtropical Asia and New Guinea. 35 species occur in China, of which 27 are endemic. The first description of the genus was of the type species P. lanceolata made in 1836 by Christian Gottfried Daniel Nees von Esenbeck in Systema Laurinarum, p. 98.
Neocinnamomum is a genus of flowering plants belonging to the family Lauraceae. They are evergreen shrubs or small trees, indigenous to Bhutan, China, India, Indonesia (Sumatra), Myanmar, Nepal, Thailand, and Vietnam.
Actinodaphne is an Asian genus of flowering plants in the laurel family (Lauraceae). It contains approximately 125 species of dioecious evergreen trees and shrubs.
Beilschmiedia is a genus of trees and shrubs in family Lauraceae. Most of its species grow in tropical climates, but a few of them are native to temperate regions, and they are widespread in tropical Asia, Africa, Madagascar, Australia, New Zealand, North America, Central America, the Caribbean, and South America. The best-known species to gardeners in temperate areas are B. berteroana and B. miersii because of their frost tolerance. Seeds of B. bancroftii were used as a source of food by Australian Aborigines. Timbers of some species are very valuable.
Eusideroxylon is a genus of evergreen trees of the family Lauraceae. The genus is monotypic, and includes one accepted species, Eusideroxylon zwageri. It is known colloquially in English as Bornean ironwood, billian, or ulin.
Mezilaurus is a genus of plant in the family Lauraceae. It is a neotropical genus consisting of 18-27 species, mostly hardwood evergreen trees, occurring from Costa Rica to the southeast of Brazil. Thirteen species have been identified in Brazil, distributed mostly in the Amazon region. In Rio de Janeiro state only M. navalium (Allemão) Taub. ex Mez has been recorded. Some species have been reported within the Cerrado and in semideciduous forest surrounding the Pantanal Matogrossense. The name Mezilaurus refers to its similar appearance to the genus Laurus.
Adenodaphne is a genus of shrubs and small trees endemic to New Caledonia belonging to the family Lauraceae. The genus is related to Litsea. They have 12 chromosomes.
Dodecadenia is a botanical genus of flowering plants in the family Lauraceae. It contains a single species, Dodecadenia grandiflora. It is present from central Asia, to Himalayas and India. It is present in tropical and subtropical montane rainforest, laurel forest, in the weed-tree forests in valleys, mixed forests of coniferous and deciduous broad-leaved trees, Tsuga forests; 2,000–2,600 metres (6,600–8,500 ft) in China in provinces of Sichuan, Xizang, Yunnan, and countries of Bhutan, India, Myanmar, and Nepal.
Aspidostemon is a genus of flowering plants belonging to the family Lauraceae. It occurs in Madagascar.
Cinnadenia is a flowering plant genus belonging to the family Lauraceae. They are present in low and mountain cloud forest in Southeast Asia.
Endlicheria is a neotropical plant genus consisting of approximately 60 species, occurring mostly in northern South America and the Amazon region. Most species are medium-sized trees, sometime up to 40 metres in height, but a few species are shrubs. DNA molecular data shows that it is closely related to Rhodostemonodaphne and Ocotea.
Beilschmiedia lucidula is a widespread species of flowering plant in the family Lauraceae, native to the eastern Indian Subcontinent, Indochina, and most of Malesia. It is a tree reaching 30 m (98 ft) tall.
Cinnamomum angustitepalum is a species of tree in the laurel family (Lauraceae). It is endemic to Borneo.
Cinnamomum paiei is a species of tree in the laurel family (Lauraceae). It is endemic to Borneo. It is a tree growing to 12 metres tall, with a trunk up to 20 cm in diameter.
Cinnamomum percoriaceum is a species of tree in the laurel family (Lauraceae). It is endemic to Borneo. It is a small tree growing to 6 metres tall, with a trunk to 7 cm in diameter.
Cinnamomum racemosum is a species of tree in the laurel family (Lauraceae). It is endemic to Borneo. It is a medium-sized tree growing to 12 meters tall, with a trunk to 20 cm in diameter.
Cinnamomum sublanuginosum is a species of tree in the laurel family (Lauraceae). It is endemic to Borneo. It is a tree growing 20 to 35 metres tall, with a trunk to 30–50 cm in diameter.
Cinnamomum tahijanum is a species of tree in the laurel family (Lauraceae). It is endemic to Borneo. It is a tree growing 10 to 20 metres tall, with a trunk to 10 to 38 cm in diameter.
