Avicennia | |
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Avicennia germinans | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Lamiales |
Family: | Acanthaceae |
Subfamily: | Avicennioideae Miers |
Genus: | Avicennia L. (1753) [1] |
Species | |
See text | |
Synonyms [2] | |
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Avicennia is a genus of flowering plants currently placed in the bear's breeches family, Acanthaceae. It contains mangrove trees, which occur in the intertidal zones of estuarine areas and are characterized by its "pencil roots", which are aerial roots. They are also commonly known as api api, which in the Malay language means "fires", a reference to the fact that fireflies often congregate on these trees. [3] Species of Avicennia occur worldwide south of the Tropic of Cancer.
The taxonomic placement of Avicennia is contentious. In some classifications, it has been placed in the family Verbenaceae, but more recently has been placed by some botanists in the monogeneric family Avicenniaceae. Recent phylogenetic studies have suggested that Avicennia is derived from within Acanthaceae, and the genus is included in that family in the Angiosperm Phylogeny Group system.
Designation of species is made difficult by the great variations in form of Avicennia marina . Between eight and 10 species are usually recognised, with A. marina further divided into a number of subspecies.
The generic name honours Persian physician Avicenna (980-1037). [4]
Members of the genus are among the most salt-tolerant mangroves and are often the first to colonise new deposits of sediment. The sap is salty, and excess salt is secreted through the leaves. The spreading root system provides stability in shifting substrates. Vertical roots called pneumatophores project from the mud, thus the term "pencil roots". These are used in gas exchange as very little oxygen is available in the mud. The flowers are fragrant and rich in nectar, and are pollinated by insects. The embryos exhibit cryptovivipary, a process where they start to develop before the seed is shed, but do not break through the outside of the fruit capsule. [5]
Eight species are currently accepted: [2]
The Verbenaceae, the verbena family or vervain family, is a family of mainly tropical flowering plants. It contains trees, shrubs, and herbs notable for heads, spikes, or clusters of small flowers, many of which have an aromatic smell.
Avicennia marina, commonly known as grey mangrove or white mangrove, is a species of mangrove tree classified in the plant family Acanthaceae. As with other mangroves, it occurs in the intertidal zones of estuarine areas.
Rhizophora mangle, also known as the red mangrove, is a salt-tolerant, small-to-medium sized evergreen tree restricted to coastal, estuarine ecosystems along the southern portions of North America, the Caribbean as well as Central America and tropical West Africa. Its viviparous "seeds", in actuality called propagules, become fully mature plants before dropping off the parent tree. These are dispersed by water until eventually embedding in the shallows.
Ruellia is a genus of flowering plants commonly known as ruellias or wild petunias. They are not closely related to petunias (Petunia) although both genera belong to the same euasterid clade. The genus was named in honor of Jean Ruelle (1474–1537), herbalist and physician to Francis I of France and translator of several works of Dioscorides.
Clerodendrum is a genus of flowering plants formerly placed in the family Verbenaceae, but now considered to belong to the Lamiaceae (mint) family. Its common names include glorybower, bagflower and bleeding-heart. It is currently classified in the subfamily Ajugoideae, being one of several genera transferred from Verbenaceae to Lamiaceae in the 1990s, based on phylogenetic analysis of morphological and molecular data.
Gmelina is a genus of plants in the family Lamiaceae. It consists of about 35 species in Australia, New Guinea, New Caledonia, Southeast Asia, India and a few in Africa. Some species such as G. arborea have been planted and/or become naturalised in India, Africa and Australia. It was named by Carl Linnaeus in honour of botanist Johann Georg Gmelin.
Avicennia officinalis is a species of mangrove also known as Indian mangrove. The genus Avicennia is named after the famous Persian scientist Ibn Sina.
Hedyotis (starviolet) is a genus of flowering plants in the family Rubiaceae. Many species of this genus such as Hedyotis biflora, H. corymbosa and H. diffusa are well known medicinal plants. Hedyotis is native to tropical and subtropical Asia and to islands of the northwest Pacific. It comprises about 115 species. The type species for the genus is Hedyotis fruticosa.
Avicennia rumphiana is a species of tropical mangrove in the family Acanthaceae. It is considered vulnerable by the IUCN Red List of Threatened Species in the 2008 assessment. As of March 2022, Plants of the World Online considered it to be only a variety of Avicennia marina, Avicennia marina var. rumphiana. In the Malay language it is known as api api bulu.
Balanophora fungosa, sometimes known as fungus root, is a flowering plant in the family Balanophoraceae and occurs in South Asia, Southeast Asia, Australia and some Pacific islands. It is a parasite growing on the roots of rainforest trees. The flowering structure is shaped like a puffball but in fact consists of a globe covered with thousands of tiny female flowers. The globe is surrounded at its base by a much smaller number of male flowers. In flower, the plant emits an odour resembling that of mice.
The Abatan River is a river in western Bohol, Philippines. The river winds through the towns of Catigbian, Antequera, Balilihan, and Maribojoc to its mouth at Cortes.
Rhizophora harrisonii is a species of plant in the family Rhizophoraceae. It can be found in Brazil, Cameroon, Colombia, Costa Rica, Ecuador, Guyana, French Guiana, Honduras, Nicaragua, Panama, Suriname, Trinidad, Tobago, and Venezuela.
Avicennia schaueriana is a species of tropical mangrove in the family Acanthaceae. It grows in coastal and estuarine locations along the Atlantic coast of northeastern South America, from Venezuela and the Leeward Islands through Trinidad and Tobago, the Windward Islands, the Guianas, and Brazil to Uruguay.
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