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Exallosperma
''Exallosperma longiflora'' is a species of flowering plant belonging to the family Rubiaceae. It is a shrub endemic to Madagascar. It is the sole species in genus ''Exallosperma''. ''Exallosperma longiflora'' is a shrub which grows up to 5 meters tall. It flowers in January and February, and fruits in April. It is known only from the northern tip of Madagascar in Sava and Diana regions. It grows in lowland dry deciduous and semi-deciduous forest on limestone, from sea level to 450 meters elevation.De Block P, Rakotonasolo F, Ntore S, Razafimandimbison SG, Janssens S (2018) Four new endemic genera of Rubiaceae (Pavetteae) from Madagascar represent multiple radiations into drylands. ''PhytoKeys'' 99: 1-66. https://doi.org/10.3897/phytokeys.99.23713 The genus is distinguished within tribe Pavetteae by pollen with psilate tectum, and by fruit with two stony pyrene Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flowering Plant
Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of broad-leaved trees, shrubs and vines, and most aquatic plants. The term "angiosperm" is derived from the Greek words ἀγγεῖον / ('container, vessel') and σπέρμα / ('seed'), meaning that the seeds are enclosed within a fruit. They are by far the most diverse group of land plants with 64 orders, 416 families, approximately 13,000 known genera and 300,000 known species. Angiosperms were formerly called Magnoliophyta (). Angiosperms are distinguished from the other seed-producing plants, the gymnosperms, by having flowers, xylem consisting of vessel elements instead of tracheids, endosperm within their seeds, and fruits that completely envelop the seeds. The ancestors of flowering plants diverged from the common ance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rubiaceae
The Rubiaceae are a family of flowering plants, commonly known as the coffee, madder, or bedstraw family. It consists of terrestrial trees, shrubs, lianas, or herbs that are recognizable by simple, opposite leaves with interpetiolar stipules and sympetalous actinomorphic flowers. The family contains about 13,500 species in about 620 genera, which makes it the fourth-largest angiosperm family. Rubiaceae has a cosmopolitan distribution; however, the largest species diversity is concentrated in the tropics and subtropics. Economically important genera include '' Coffea'', the source of coffee, '' Cinchona'', the source of the antimalarial alkaloid quinine, ornamental cultivars (''e.g.'', '' Gardenia'', '' Ixora'', '' Pentas''), and historically some dye plants (''e.g.'', '' Rubia''). Description The Rubiaceae are morphologically easily recognizable as a coherent group by a combination of characters: opposite or whorled leaves that are simple and entire, interpetiolar sti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example ''Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagascar
Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa across the Mozambique Channel. At Madagascar is the world's List of island countries, second-largest island country, after Indonesia. The nation is home to around 30 million inhabitants and consists of the island of Geography of Madagascar, Madagascar (the List of islands by area, fourth-largest island in the world), along with numerous smaller peripheral islands. Following the prehistoric breakup of the supercontinent Gondwana, Madagascar split from the Indian subcontinent around 90 million years ago, allowing native plants and animals to evolve in relative isolation. Consequently, Madagascar is a biodiversity hotspot; over 90% of wildlife of Madagascar, its wildlife is endemic. Human settlement of Madagascar occurred during or befo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plants Of The World Online
Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by 2020". The initial focus was on tropical African Floras, particularly Flora Zambesiaca, Flora of West Tropical Africa and Flora of Tropical East Africa. The database uses the same taxonomical source as Kew's World Checklist of Selected Plant Families, which is the International Plant Names Index, and the World Checklist of Vascular Plants (WCVP). POWO contains 1,234,000 global plant names and 367,600 images. See also *Australian Plant Name Index The Australian Plant Name Index (APNI) is an online database of all published names of Australian vascular plants. It covers all names, whether current names, synonyms or invalid names. It includes bibliographic and typification details, informati ... * Convention on Biological Diversity * W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sava Region
Sava is a region in northern Madagascar. Its capital is Sambava. Until 2009 Sava belonged to Antsiranana Province. The region is situated at the northern part of the east coast of Madagascar. It is bordered by the region Diana to the north, Sofia to the west, and Analanjirofo to the south. As of 2018, its population was 1,123,013 and the total area is . The region contains wild areas such as Marojejy National Park. The name of the region is composed of the initial letters of its four principal towns: Sambava, Antalaha, Iharana (Vohimaro), and Andapa. Each of these towns claims itself the World Capital of Vanilla, a spice of which the region is the largest producer of in the world (especially the highly sought-after Bourbon vanilla variety). The economic importance of vanilla cultivation in the Sava Region encouraged the reconstruction of the road that connects the towns, called the ''Route de la vanille'' (The Vanilla Route), in the latter half of 2005. However, due to the volat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diana Region
Diana is a region in Madagascar at the northeast part of the island. It borders the regions of Sava to the southeast and Sofia to the southwest. It covers an area of 19,266 km2, and had a population of 889,736 in 2018. The regional capital is Antsiranana (previously known as ''Diego Suarez''). Geography Rivers The main rivers of the Diana region are: * Besokatra River * Irodo River * Loky River * Mahavavy River * Ramena River * Saharenana River * Sambirano River Protected areas and visitors' attractions The following national parks, reserves and visitors' attractions are located in Diana: * Ambodivahibe New Protected Area * Andrafiamena Andavakoera New Protected Area *Nosy Antsoha New Protected Area * Ampasindava New Protected Area * Galoko Kalobinono New Protected Area * Oronjia New Protected Area * Amber Mountain National Park * Analamerana Reserve * Ankarana Reserve * Lokobe National Park * Manongarivo Reserve * Tsaratanana National Park *Nosy Hara National Park *Nosy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagascar Dry Deciduous Forests
The Madagascar dry deciduous forests represent a tropical dry forest ecoregion situated in the western and northern part of Madagascar. The area has high numbers of endemic plant and animal species but has suffered large-scale clearance for agriculture. They are among the world's richest and most distinctive dry forests and included in the Global 200 ecoregions by the World Wide Fund. The area is also home to distinctive limestone karst formations known as tsingy, including the World Heritage Site of Bemaraha. Geography There are two separate areas within the ecoregion: the western side of Madagascar from the Ampasindava peninsula in the north to Belo-sur-Tsiribihina and Maromandia in the south (this is most of Mahajanga Province); and the northern tip of the island (apart from the high areas of Amber Mountain). Geological substrate is varied and includes the tsingy limestone massifs. These dry deciduous forests span the coastal plain with its limestone plateaus e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavetteae
Pavetteae is a tribe of flowering plants in the family Rubiaceae and contains about 624 species in 9 genera. Its representatives are found from the tropics and subtropics of the Old World and the southern Pacific region. Genera Currently accepted names * '' Cladoceras'' Bremek. (1 sp) * ''Coptosperma'' Hook.f. (21 sp) * '' Leptactina'' Hook.f. (19 sp) * '' Nichallea'' Bridson (1 sp) * '' Paracephaelis'' Baill. (4 sp) * '' Pavetta'' L. (358 sp) * '' Robbrechtia'' De Block (2 sp) * '' Rutidea'' DC. (21 sp) * ''Tarenna'' Gaertn. (191 sp) Synonyms * ''Acmostigma'' Raf. = '' Pavetta'' * ''Baconia'' DC. = '' Pavetta'' * ''Bonatia'' Schltr. & K.Krause = ''Tarenna'' * ''Camptophytum'' Pierre ex A.Chev. = ''Tarenna'' * ''Canthiopsis'' Seem. = ''Tarenna'' * ''Chomelia'' L. = ''Tarenna'' * ''Coleactina'' N.Hallé = '' Leptactina'' * ''Crinita'' Houtt. = '' Pavetta'' * ''Cupi'' Adans. = ''Tarenna'' * ''Dictyandra'' Welw. ex Hook.f. = '' Leptactina'' * ''Enterospermum'' Hiern = ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrena
A pyrena or pyrene (commonly called a "pit" or "stone") is the fruitstone within a drupe or drupelet produced by the ossification of the endocarp or lining of the fruit. It consists of a hard endocarp tissue surrounding one or more seeds (also called the "kernel"). The hardened endocarp which constitutes the pyrene provides a protective physical barrier around the seed, shielding it from pathogens and herbivory. While many drupes are monopyrenous, containing only one pyrene, pome-type fruit with a hard, stony (rather than leathery) endocarp are typically polypyrenous drupes, containing multiple pyrenes. Development The hardening of the endocarp of a developing drupe occurs via secondary cell wall formation and lignification. The biopolymer lignin, also found in wood, provides a structure within secondary cell walls which supports the polymerisation of cellulose and hemicellulose; together these polymers provide the endocarp with tensile strength and stiffness. Furt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Rubiaceae Genera
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa. Examples Just as the term ''monotypic'' is used to describe a taxon including only one subdivision, the contained taxon can also be referred to as monotypic within the higher-level taxon, e.g. a genus monotypic within a family. Some examples of monotypic groups are: Plants * In the order Amborellales, there is only one family, Amborellaceae and there is only one genus, ''Amborella'', and in this genus there is only one species, namely ''Amborella trichopoda.'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Flora Of Madagascar
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example ''Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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