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Leaf Size
Leaf size of plants can be described using the terms ''megaphyll'', ''macrophyll'', ''mesophyll'', ''microphyll'', ''nanophyll'' and ''leptophyll'' (in descending order) in a classification devised in 1934 by Christen C. Raunkiær and since modified by others. Definitions vary, some referring to length and others to area. Raunkiaer's original definitions were by leaf area, and differed by a factor of nine at each stage. Some authors simplified the system to make it specific to particular climates, and have introduced extra terms including ''notophyll'', ''picophyll'', ''platyphyll'' and ''subleptophyll''. In ecology, microphyll and similar terms based on blade size of the leaf are used to describe a flora, for example, a "microphyll rainforest" is often defined as a forest where the dominant trees have leaves less than 7.5 cm in length. Raunkiaer's work Christen C. Raunkiaer proposed using leaf size as a relatively easy measurement that could be used to compare the adaptation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christen C
To christen is to perform the religious act of baptism. Christen may also refer to: People Surname * Adolf Christen (1811–1883), court actor, theater director and theater manager * Andreas Christen (born 1989), footballer from Liechtenstein * Björn Christen (born 1980), Swiss ice hockey player * Brian Christen (1926–2000), Canadian cricketer * Claudia Christen (born 1973), Swiss designer * Georges Christen (born 1962), Luxembourgish strongman * Mathias Christen (born 1987), footballer from Liechtenstein * Morgan Christen (born 1961), American judge * Siena Christen, German paralympic athlete * Theophil Friedrich Christen (1879–1920), Swiss scientist Given name * Christen Aagaard (1616–1664), Danish poet * Christen Thorn Aamodt (1770–1836), Norwegian priest * Christen Larsen Arneberg (1808–1874), Norwegian politician * Christen Thomsen Barfoed (1815–1899), Danish chemist * Christen Berg (1829–1891), Danish politician and editor * Christen Gran Bøgh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecology
Ecology () is the natural science of the relationships among living organisms and their Natural environment, environment. Ecology considers organisms at the individual, population, community (ecology), community, ecosystem, and biosphere levels. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology, and is the study of abundance (ecology), abundance, biomass (ecology), biomass, and distribution of organisms in the context of the environment. It encompasses life processes, interactions, and adaptations; movement of materials and energy through living communities; ecological succession, successional development of ecosystems; cooperation, competition, and predation within and between species; and patterns of biodiversity and its effect on ecosystem processes. Ecology has practical applications in fields such as conservation biology, wetland management, natural resource m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora
Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. The corresponding term for animals is ''fauna'', and for fungi, it is ''funga''. Sometimes bacteria and fungi are also referred to as flora as in the terms ''gut flora'' or ''skin flora'' for purposes of specificity. Etymology The word "flora" comes from the Latin name of Flora (mythology), Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonard Webb (academic)
Leonard James Webb (28 October 1920 – 25 November 2008) was a widely awarded Australian ecologist and ethnobotanist who was the author or joint-author of over 112 scientific papers throughout the course of his professional career. His pioneering work as Senior Principal Research Scientist alongside Geoff Tracey in the CSIRO Rainforest Ecology Research Unit in the 1950s led to the publication of the first systematic classification of Australian rainforest vegetation in the ''Journal of Ecology'' in 1959. In the early '80s, after decades of ongoing research, Webb and Tracey had accumulated a large corpus of scientific evidence which confirmed that Australian tropical rainforests had evolved from Gondwana over 100 million years ago and were not, as previously believed, relatively recent arrivals from South East Asia. This discovery served to consolidate the scientific basis for a number of major conservation campaigns across Queensland and paved the way for the subsequent succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunnera Manicata
''Gunnera manicata'', known as Brazilian giant-rhubarb or giant rhubarb, is a species of flowering plant in the family Gunneraceae from the coastal Serra do Mar Mountains of Santa Catarina, Parana and Rio Grande do Sul States, Brazil. In cultivation, the name ''G. manicata'' has regularly been wrongly applied to the hybrid with '' G. tinctoria'', ''G.'' × ''cryptica''. Description ''Gunnera manicata'' is a large, clump-forming herbaceous perennial growing to tall by or more in width. The leaves of ''G. manicata'' grow to an impressive size. Leaves with diameters well in excess of are commonplace, with a spread of on a mature plant. The largest on record had leaves up to in width. It is the largest of all the ''Gunnera'' species, but not the tallest (see '' Gunnera masafuerae''). The underside of the leaf and the whole stalk have spikes on them. In early summer it bears tiny red-green, dimerous flowers in conical branched panicles, followed by small, sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raphia Regalis
''Raphia regalis'' is a species of flowering plant in the Palm Family Arecaceae r Palmae. It is found in Angola, Cameroon, Republic of the Congo, Gabon, and Nigeria. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss. Raphia regalis has extraordinarily large leaves. Botanist/ecologist Francis Halle encountered a specimen in the Republic of Congo bearing a frond 25.91 meters (85 feet) in total length, of which 16.47 meters (54 feet) is the blade or lamina while 9.44 meters is the stalk or petiole of which 80 cm (32 inches) was below soil level. These near-vertical fronds are arranged in the very rare 1/4 phyllotaxy. Description ''Raphia regalis'' is an evergreen palm with an underground trunk, giving it the appearance of being stemless. The true trunk, rarely exceeding a meter in length, remains buried beneath the soil. Towering above it, the plant produces enormous, arching leaves that can grow beyond 20 meters, making them t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manicaria Saccifera
''Manicaria'' (Common names Monkey Cap Palm or Bussu) is a Arecaceae, palm genus which is found in Trinidad, Central America, Central and South America. It contains two recognized species: #''Manicaria martiana'' Burret – Colombia, northwestern Brazil #''Manicaria saccifera'' Gaertn. – Central America, Trinidad, Venezuela, Colombia, Ecuador, Peru, northwestern Brazil It has one of the largest known leaves in the plant kingdom (up to 8 metres in length). The very largest leaves can be 34 feet (10.3 meters) total length, with 30 feet (nine meters) being the blade or Lamina (leaf), lamina and a stalk or Petiole (botany), petiole of four feet (1.3 meters) length. The blade is up to 7ft 8in ( 2.3 meters) in width. It is an Entire (botany), entire obovate pinnately veined leaf with marginal teeth. Flora of Suriname Volume 5 Part 1 (1965) page 21 ''Manicaria'' thrives in swamps or estuarine areas where river meets ocean. In the Tortuguero region of Costa Rica, where ''Manicaria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marojejya Darianii
''Marojejya darianii'', the big-leaf palm or Ravimbe Palm, is a species of flowering palm tree in the Palm Family (Arecaceae or Palmae). It is found only in the rainforests of Madagascar and was completely unknown to the larger world until 1984 when it was discovered by Dr. Mardy Darian. It is critically endangered, and threatened with extinction due to habitat loss. It is important because it bears the largest simple leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, fl ... (undivided, unlobed) of any known tree; up to long by up to wide. References darianii Endemic flora of Madagascar Critically endangered plants Taxonomy articles created by Polbot {{Areceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannesteijsmannia Altifrons
''Johannesteijsmannia altifrons'' is a species of flowering plant in the palm family. It is native to southern Thailand, Peninsular Malaysia, Borneo, and Sumatra. Flowers of this species smell of sour milk. Description This is a medium-sized, stemless palm with a subterranean, creeping base that can reach up to 15 cm in diameter. It forms a dense crown of 20–30 large, upright leaves that can grow up to 3.5 m in length and 1.8 m in width. The leaves have a pleated structure with up to 20 or more folds on each side, a leathery texture, and serrated edges. The petioles, reaching up to 2.5 m long, are lined with minute spines and transition into a broad leaf blade that is smooth underneath but covered in brown scales near the central rib. The inflorescence starts upright before arching downward, branching into multiple levels. The flowering stalk is 30–50 cm long, bearing 20–100 smaller branches covered in fine white fuzz. The flowers are small, cream-colored, and pointed w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amorphophallus Titanum
The titan arum (''Amorphophallus titanum'') is a flowering plant in the family Araceae. It has a large unbranched inflorescence; a tall single leaf, branched like a tree; and a heavy tuber which enables the plant to produce the inflorescence. ''A. titanum'' is endemic to rainforests on the Indonesian island of Sumatra. Its flower blooms infrequently and only for a short period, and gives off a powerful scent of rotting flesh which attracts pollinators. As a consequence, it is characterized as a carrion flower, earning it the names corpse flower or corpse plant. The titan arum was first brought to flower in cultivation at the Royal Botanic Gardens, Kew in 1889. Since then it has flowered at many botanic gardens. It remains difficult for amateurs to cultivate, but one flowered at a high school in California in 2011. Flowerings can attract crowds of thousands of visitors, and in the 21st century also thousands on Internet live streaming. Etymology ''A. titanum'' derives its n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria Amazonica
''Victoria amazonica'' is a species of flowering plant, the second largest in the water lily family Nymphaeaceae. It is called Vitória-Régia or Iaupê-Jaçanã ("the Jacanidae, jacana's waterlily") in Brazil and Atun Sisac ("great flower") in Inca language, Inca (Quechua people, Quechua). Its native region is tropical South America, specifically Guyana and the Amazon Basin. Taxonomy The species is a member of the genus ''Victoria (plant), Victoria'', placed in the family Nymphaeaceae or sometimes in the Euryale ferox, Euryalaceae. The first published description of the genus was by John Lindley in October 1837, based on specimens of this plant returned from British Guiana by Robert Hermann Schomburgk, Robert Schomburgk. Lindley named the genus after the newly ascended Queen Victoria, and the species ''Victoria regia''. The spelling in Schomburgk's description in ''Athenaeum (British magazine), Athenaeum'', published the month before, was given as ''Victoria Regina''.R.H.Scho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf
A leaf (: leaves) is a principal appendage of the plant stem, stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the Shoot (botany), shoot system. In most leaves, the primary Photosynthesis, photosynthetic Tissue (biology), tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf, but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. The leaf is an integral part of the stem system, and most leaves are flattened and have distinct upper (Glossary of botanical terms#adaxial, adaxial) and lower (Glossary of botanical terms#abaxial, abaxial) surfaces that differ in color, Trichome, hairiness, the number of stomata (pores that intake and output gases), the amount and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
