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Alloxylon Brachycarpum
''Alloxylon brachycarpum'' is a species of plant in the family Proteaceae. It is found in Indonesia and Papua New Guinea. It is threatened by habitat loss. Description ''Alloxylon brachycarpum'' grows as a tree reaching 20–40 m high, with a rough, flaking grey to brown trunk. The adult leaves are simple and oval shaped, measuring 6–15 cm long by 2.5–5 cm wide with entire margins. The orange-red flower heads each contain 8 to 25 individual flowers arranged in racemes. These are followed by the development of the leathery seed pods, or fruit, up to 14 cm long and 2.5 cm wide, each of which contain 10-14 winged seeds in two rows. It resembles the Australian species '' A. flammeum'', which has longer, narrower leaves and brighter flowers. Taxonomy Dutch botanist Herman Sleumer described this species as ''Embothrium brachycarpum'' in 1939 before transferring it to the genus ''Oreocallis''. However the fruit of the type specimen were deformed and the spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Otto Sleumer
Hermann Otto Sleumer (February 21, 1906 in Saarbrücken – October 1, 1993 in Oegstgeest) was a Dutch botanist of German birth. The plant genera ''Sleumerodendron'' Virot (Proteaceae) and ''Sleumeria'' Utteridge, Nagam. & Teo (Icacinaceae The Icacinaceae, also called the white pear family, are a family of flowering plants,"Icacinaceae" At: Angiosperm Phylogeny Website At: Missouri Botanical Garden Website (see ''External links'' below). consisting of trees, shrubs, and lianas, pri ...), are named for him. References 1906 births 1993 deaths Dutch people of German descent People from Saarbrücken 20th-century Dutch botanists {{Netherlands-botanist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreocallis
''Oreocallis'' is a South American plant genus in the family Proteaceae. There is only one species, ''Oreocallis grandiflora'', which is native to mountainous regions in Peru and Ecuador. Previously, the genus was considered to have several species on both sides of the Pacific Ocean, however the four Australasian species were reclassified in the genus ''Alloxylon''. The genus was originally defined by Robert Brown in 1810 to contain the Australian species now classified elsewhere, while the two recognised South American species were placed in ''Embothrium'' at the time. A reclassification by Dutch botanist Hermann Otto Sleumer in 1954 saw these species transferred into ''Oreocallis''. A second species ''O. mucronata'', has been reclassified as conspecific with ''O. grandiflora''. Some recent sources recognize both species. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of New Guinea
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of The Maluku Islands
In botany, a tree is a perennial plant A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ... with an elongated Plant stem, stem, or trunk (botany), trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller Arecaceae, palms, Cyatheales, tree ferns, Musa (genus), bananas, and bamboos are also trees. Trees are not a Taxon, taxonomic group but include a variety of plant species that Convergent evolution, have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Plants
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 3654 endangered plant species. 17% of all evaluated plant species are listed as endangered. The IUCN also lists 99 subspecies and 101 varieties as endangered. No subpopulations of plants have been evaluated by the IUCN. For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of exintction". An even higher risk is faced by ''critically endangered'' species, which meet the quantitative criteria for endangered species. Critically endangered plants are listed separately. There are 6147 plant species which are endangered or critically endangered. Additionally 1674 plant species (7.6% of those evaluated) are listed as '' data deficient'', meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aru Islands
The Aru Islands Regency ( id, Kabupaten Kepulauan Aru) is a group of about 95 low-lying islands in the Maluku Islands of eastern Indonesia. It also forms a regency of Maluku Province, with a land area of . At the 2011 Census the Regency had a population of 84,138;Biro Pusat Statistik, Jakarta, 2011. the 2020 Census produced a total of 102,237. Some sources regard the archipelago as part of Asia, while others regard it as part of Melanesia. Administration At the time of the 2010 Census, the regency was divided into seven districts (''kecamatan''), but subsequently an additional three districts have been created by the splitting of existing districts. The districts are tabulated below with their areas (in km2) and their populations at the 2010 Census and 2020 Census. The table also includes the locations of the district administrative centres, the number of villages (''desa'') in each district, and its postal code. Notes: (a) the 2010 population of Aru Utara Timur Batuley and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alloxylon
''Alloxylon'' is a genus of four species in the family Proteaceae of mainly small to medium-sized trees. They are native to the eastern coast of Australia, with one species, '' A. brachycarpum'' found in New Guinea and the Aru Islands. The genus is a relatively new creation, being split off from ''Oreocallis''. The name is derived from Ancient Greek ''allo-'' "other" or "strange" and ''xylon'' or "wood" due to their unusual cell architecture compared with the related genera ''Telopea'' and ''Oreocallis''. In Australia, they are known as tree waratahs due to similarities in the inflorescences between them and the closely related '' Telopea''. Classification Together with '' Telopea'', ''Oreocallis'' and ''Embothrium'', ''Alloxylon'' makes up a small group of terminal often red-flowering showy plants scattered around the southern edges of the Pacific Rim. Known as the subtribe Embothriinae, this is an ancient group with roots in the mid Cretaceous, when Australia, Antarctica and So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Botanic Gardens, Sydney
The Royal Botanic Garden, Sydney is a heritage-listed major botanical garden, event venue and public recreation area located at Farm Cove on the eastern fringe of the Sydney central business district, in the City of Sydney local government area of New South Wales, Australia. Opened in 1816, the garden is the oldest scientific institution in Australia and one of the most important historic botanical institutions in the world. The overall structure and key elements were designed by Charles Moore and Joseph Maiden, and various other elements designed and built under the supervision of Allan Cunningham, Richard Cunningham, and Carrick Chambers. The garden is owned by the Government of New South Wales and administered by the Royal Botanic Gardens and Domain Trust. The Botanic Garden, together with the adjacent Domain were added to the New South Wales State Heritage Register on 2 April 1999. The Garden and The Domain are open every day of the year and access is free. Its stunni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alloxylon Flammeum
''Alloxylon flammeum'', commonly known as the Queensland tree waratah or red silky oak, is a medium-sized tree of the family Proteaceae found in the Queensland tropical rain forests of northeastern Australia. It has shiny green elliptical leaves up to long, and prominent orange-red inflorescences that appear from August to October, followed by rectangular woody seed pods that ripen in February and March. Juvenile plants have large (up to long) deeply lobed pinnate leaves. Previously known as ''Oreocallis wickhamii'', the initial specimen turned out to be a different species to the one cultivated and hence a new scientific name was required. Described formally by Peter Henry Weston, Peter Weston and Michael Douglas Crisp, Mike Crisp in 1991, ''A. flammeum'' was designated the type species of the genus ''Alloxylon''. This genus contains the four species previously classified in ''Oreocallis'' that are found in Australasia. ''Alloxylon flammeum'' is a Canopy (biology), canopy or Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Crisp
Michael Douglas Crisp (born 1950) is an emeritus professor in the Research School of Biology at the Australian National University located in Canberra. In 1976 he gained a PhD from the University of Adelaide, studying long-term vegetation changes in arid zones of South Australia. In 2020 Professor Crisp moved to Brisbane where he has an honorary position at the University of Queensland. Together with others he has revised various pea-flowered legume genera (''Daviesia'', ''Gastrolobium'', ''Gompholobium'', ''Pultenaea'' and ''Jacksonia''). He has made considerable contributions to biogeography, phylogeny A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological spec ... and plant evolution. Some taxa authored *See :Taxa named by Michael Crisp References {{DEFAULTSORT:Crisp, Michael ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raceme
A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the shoot grows in height, with no predetermined growth limit. Examples of racemes occur on mustard (genus ''Brassica'') and radish (genus ''Raphanus'') plants. Definition A ''raceme'' or ''racemoid'' is an unbranched, indeterminate type of inflorescence bearing pedicellate flowers (flowers having short floral stalks called ''pedicels'') along its axis. In botany, an ''axis'' means a shoot, in this case one bearing the flowers. In indeterminate inflorescence-like racemes, the oldest flowers grow close to the base and new flowers are produced as the shoot grows in height, with no predetermined growth limit. A plant that flowers on a showy raceme may have this reflected in its scientific name, e.g. the species ''Cimicifuga racemosa''. A compou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat Loss
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby reducing biodiversity and species abundance. Habitat destruction is the leading cause of biodiversity loss. Fragmentation and loss of habitat have become one of the most important topics of research in ecology as they are major threats to the survival of endangered species. Activities such as harvesting natural resources, industrial production and urbanization are human contributions to habitat destruction. Pressure from agriculture is the principal human cause. Some others include mining, logging, trawling, and urban sprawl. Habitat destruction is currently considered the primary cause of species extinction worldwide. Environmental factors can contribute to habitat destruction more indirectly. Geological processes, climate change, introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
