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Dalbergia Dalzielii
''Dalbergia'' is a large genus of small to medium-size trees, shrubs and lianas in the pea family, Fabaceae, subfamily Faboideae. It was recently assigned to the informal monophyletic ''Dalbergia'' clade (or tribe): the Dalbergieae. The genus has a wide distribution, native to the tropical regions of Central and South America, Africa, Madagascar and southern Asia. Fossil record A fossil †''Dalbergia phleboptera'' seed pod has been found in a Chattian deposit, in the municipality of Aix-en-Provence in France. Fossils of †''Dalbergia nostratum'' have been found in rhyodacite tuff of Lower Miocene age in Southern Slovakia near the town of Lučenec. Fossil seed pods of †''Dalbergia mecsekense'' have been found in a Sarmatian deposit in Hungary. †''Dalbergia lucida'' fossils have been described from the Xiaolongtan Formation of late Miocene age in Kaiyuan County, Yunnan Province, China. Uses Many species of ''Dalbergia'' are important timber trees, valued for their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dalbergia Sissoo
''Dalbergia sissoo'', known commonly as North Indian rosewood or ''shisham'', is a fast-growing, hardy, deciduous rosewood tree native to the Indian subcontinent and southern Iran. ''D. sissoo'' is a large, crooked tree with long, leathery leaves and whitish or pink flowers. Description ''Dalbergia sissoo'' is a medium to large deciduous tree with a light crown, which reproduces by seeds and suckers. It can grow up to in height and in diameter, but is usually smaller. Trunks are often crooked when grown in the open. Leaves are leathery, alternate, pinnately compound, and about long. Flowers are whitish to pink, fragrant, nearly sessile, up to long, and in dense clusters in length. Pods are oblong, flat, thin, strap-like, long, wide, and light brown. They contain one to five flat, bean-shaped seeds, long. They have a long taproot and numerous surface roots that produce suckers. Young shoots are downy and drooping; established stems have light brown to dark gray bark, u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South African Journal Of Botany
The ''South African Journal of Botany'' (Afrikaans title: ''Suid-Afrikaanse tydskrif vir plantkunde'') is a bimonthly peer reviewed scientific journal covering all aspects of botany as related to Southern Africa. It is published by Elsevier on behalf of the South African Association of Botanists, of which it is an official journal. It was established in 1982 and, after publishing 3 volumes, absorbed the ''Journal of South African Botany'' as of 1985. The latter journal had been established in 1935 and the merged journal continued the volume numbering of the older one. According to the ''Journal Citation Reports'', the journal has a 2013 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 1.340. References External links * South African Association of Botanists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, ''tuffaceous sandstone''). Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the '' moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called tufa in guidebooks and in television programmes. Volcanic ash The material that is expelled in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
