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Asystasia Alba
''Asystasia alba'' is a species of tropical herb in the family Acanthaceae. It is endemic to Christmas Island, an Australian territory in the north-eastern Indian Ocean. Its specific epithet comes from the Latin ''alba'' (white), referring to the colour of its flowers. Description ''Asystasia alba'' is an erect woody herb, growing to 0.5–0.75 m in height. Its 30–140 mm long leaves are ovate, acuminate or acute, pale green in colour and usually bristly when young. The inflorescence is 60–80 mm long, the flowers single or occasionally paired, the bracts and bracteoles about 2 mm long and the pedicels 1.5–3 mm long. The corolla is white or violet, and the tube 14–18 mm long. The capsule is usually 2-seeded and about 26 mm long. The seeds are 4 mm long. ''Asystasia alba'' is a variable species; it forms part of a species complex that includes '' A. australasica'' and '' A. oppositiflora'', but differs from both of them in havi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Nicholas Ridley
Henry Nicholas Ridley CMG (1911), MA (Oxon), FRS, FLS, F.R.H.S. (10 December 1855 – 24 October 1956) was an English botanist, geologist and naturalist who lived much of his life in Singapore. He was instrumental in promoting rubber trees in the Malay Peninsula and, for the fervour with which he pursued it, came to be known as "Mad Ridley". Life Henry Ridley was the second son and third child born to Louisa Pole Stuart and Oliver Matthew Ridley in West Harling in Norfolk, where his father was the Rector. At the age of three his mother died and his father moved to Cobham in Kent. He studied at Tonbridge School and then went to Haileybury where his brother Stuart also studied. At Cobham, he had taken to the idea of collecting insects and he continued this at Haileybury where the school encouraged him to publish a "List of the Mammals and Coleoptera of Haileybury". The two brothers left Haileybury and Henry went to a private tutor at Medmenham near Henley who encouraged him ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate and ebracteolate, without bracts. Variants Some bracts are brightly-coloured and serve the function of attracting pollinators, either together with the perianth or instead of it. Examples of this type of bract include those of ''Euphorbia pulcherrima'' (poinsettia) and ''Bougainvillea'': both of these have large colourful bracts surrounding much smaller, less colourful flowers. In grasses, each floret (flower) is enclosed in a pair of papery bracts, called the lemma (lower bract) and p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamiales Of Australia
The order Lamiales (also known as the mint order) are an order in the asterid group of dicotyledonous flowering plants. It includes about 23,810 species, 1,059 genera, and is divided into about 25 families. These families include Acanthaceae, Bignoniaceae, Byblidaceae, Calceolariaceae, Carlemanniaceae, Gesneriaceae, Lamiaceae, Lentibulariaceae, Linderniaceae, Martyniaceae, Mazaceae, Oleaceae, Orobanchaceae, Paulowniaceae, Pedaliaceae, Peltantheraceae, Phrymaceae, Plantaginaceae, Plocospermataceae, Schlegeliaceae, Scrophulariaceae, Stilbaceae, Tetrachondraceae, Thomandersiaceae, Verbenaceae. Being one of the largest orders of flowering plants, Lamiales have representatives found all over the world. Well-known or economically important members of this order include lavender, lilac, olive, jasmine, the ash tree, teak, snapdragon, sesame, psyllium, garden sage, and a number of table herbs such as mint, basil, and rosemary. Description Plant species within the order Lamiales are eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Flora Of Christmas Island
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] |
Asystasia
The genus ''Asystasia'' belongs to the family Acanthaceae and comprises approximately 70 species found in the tropics, including the weedy species ''Asystasia gangetica''. Selected species * '' Asystasia africana'' (S. Moore) C.B. Clarke * ''Asystasia alba'' Ridl. * '' Asystasia albiflora'' Ensermu * '' Asystasia ammophila'' Ensermu * '' Asystasia atriplicifolia'' Bremek. * ''Asystasia bella'' (Harvey) Benth. et Hook.f. * '' Asystasia buettneri'' Lindau * ''Asystasia calcicola'' Ensermu & Vollesen * '' Asystasia calycina'' Benth. * '' Asystasia charmian'' S.Moore * ''Asystasia chelnoides'' Nees * '' Asystasia chinensis'' S.Moore * '' Asystasia comoroensis'' S.Moore * '' Asystasia crispata'' Benth. * ''Asystasia dalzelliana'' Santapau * ''Asystasia decipiens'' Heine * ''Asystasia gangetica'' (L.) T.Anderson * ''Asystasia glandulifera'' Lindau * ''Asystasia hedbergii'' Ensermu * ''Asystasia longituba'' Lindau * ''Asystasia minutiflora'' Ensermu & Vollesen * ''Asystasia moorei' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Biological Resources Study
Australian Biological Resources Study (ABRS) is a project undertaken by Parks Australia Division of Australia's Department of the Environment, Water, Heritage and the Arts (DEWHA). Background ABRS was founded in 1973 from the recommendations of a 1972 Senate Select Committee report on Wildlife Conservation. Its purpose is to collate from the many libraries, museums and other collections the taxonomy of Australia's estimated 2 million species of flora and fauna, including aquatic species. These represent almost 20% of the earth's biodiversity, 80% of which are unique to Australia. ABRS has undertaken active funding for taxonomic research of Australia's biodiversity and is internationally recognised for its extensive data bases and publications. Publications The most important outputs of the ABRS has been the publication of the multi-volume ''Flora of Australia'' and '' Fauna of Australia'' series. Other output includes ''The Banksia Atlas'' and the "Platypus" database pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Terrace
A raised beach, coastal terrace,Pinter, N (2010): 'Coastal Terraces, Sealevel, and Active Tectonics' (educational exercise), from 2/04/2011/ref> or perched coastline is a relatively flat, horizontal or gently inclined surface of marine origin,Pirazzoli, PA (2005a): 'Marine Terraces', in Schwartz, ML (ed) ''Encyclopedia of Coastal Science.'' Springer, Dordrecht, pp. 632–633 mostly an old abrasion platform which has been lifted out of the sphere of wave activity (sometimes called "tread"). Thus, it lies above or under the current sea level, depending on the time of its formation.Strahler AH; Strahler AN (2005): ''Physische Geographie.'' Ulmer, Stuttgart, 686 p.Leser, H (ed)(2005): ‚''Wörterbuch Allgemeine Geographie.'' Westermann&Deutscher Taschenbuch Verlag, Braunschweig, 1119 p. It is bounded by a steeper ascending slope on the landward side and a steeper descending slope on the seaward side (sometimes called "riser"). Due to its generally flat shape, it is often used for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axil
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary photosynthetic 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. Most leaves are flattened and have distinct upper (adaxial) and lower (abaxial) surfaces that differ in color, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll that is essential for photosynthesis as it absorbs ligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asystasia Oppositiflora
The genus ''Asystasia'' belongs to the family Acanthaceae and comprises approximately 70 species found in the tropics, including the weedy species ''Asystasia gangetica''. Selected species * '' Asystasia africana'' (S. Moore) C.B. Clarke * ''Asystasia alba'' Ridl. * '' Asystasia albiflora'' Ensermu * ''Asystasia ammophila'' Ensermu * ''Asystasia atriplicifolia'' Bremek. * ''Asystasia bella'' (Harvey) Benth. et Hook.f. * '' Asystasia buettneri'' Lindau * ''Asystasia calcicola'' Ensermu & Vollesen * '' Asystasia calycina'' Benth. * '' Asystasia charmian'' S.Moore * '' Asystasia chelnoides'' Nees * '' Asystasia chinensis'' S.Moore * ''Asystasia comoroensis'' S.Moore * ''Asystasia crispata'' Benth. * '' Asystasia dalzelliana'' Santapau * '' Asystasia decipiens'' Heine * ''Asystasia gangetica'' (L.) T.Anderson * '' Asystasia glandulifera'' Lindau * '' Asystasia hedbergii'' Ensermu * '' Asystasia longituba'' Lindau * '' Asystasia minutiflora'' Ensermu & Vollesen * '' Asystasia m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asystasia Australasica
The genus ''Asystasia'' belongs to the family Acanthaceae and comprises approximately 70 species found in the tropics, including the weedy species ''Asystasia gangetica''. Selected species * '' Asystasia africana'' (S. Moore) C.B. Clarke * ''Asystasia alba'' Ridl. * '' Asystasia albiflora'' Ensermu * ''Asystasia ammophila'' Ensermu * ''Asystasia atriplicifolia'' Bremek. * ''Asystasia bella'' (Harvey) Benth. et Hook.f. * '' Asystasia buettneri'' Lindau * ''Asystasia calcicola'' Ensermu & Vollesen * '' Asystasia calycina'' Benth. * '' Asystasia charmian'' S.Moore * '' Asystasia chelnoides'' Nees * '' Asystasia chinensis'' S.Moore * ''Asystasia comoroensis'' S.Moore * ''Asystasia crispata'' Benth. * '' Asystasia dalzelliana'' Santapau * '' Asystasia decipiens'' Heine * ''Asystasia gangetica'' (L.) T.Anderson * '' Asystasia glandulifera'' Lindau * '' Asystasia hedbergii'' Ensermu * '' Asystasia longituba'' Lindau * '' Asystasia minutiflora'' Ensermu & Vollesen * '' Asystasia m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corolla (flower)
Petals are modified leaves that surround the reproductive parts of flowers. They are often brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''corolla''. Petals are usually accompanied by another set of modified leaves called sepals, that collectively form the ''calyx'' and lie just beneath the corolla. The calyx and the corolla together make up the perianth, the non-reproductive portion of a flower. When the petals and sepals of a flower are difficult to distinguish, they are collectively called tepals. Examples of plants in which the term ''tepal'' is appropriate include genera such as '' Aloe'' and ''Tulipa''. Conversely, genera such as ''Rosa'' and '' Phaseolus'' have well-distinguished sepals and petals. When the undifferentiated tepals resemble petals, they are referred to as "petaloid", as in petaloid monocots, orders of monocots with brightly colored tepals. Since they include Liliales, an alternative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedicel (botany)
In botany, a pedicel is a stem that attaches a single flower to the inflorescence. Such inflorescences are described as ''pedicellate''. Description Pedicel refers to a structure connecting a single flower to its inflorescence. In the absence of a pedicel, the flowers are described as sessile. Pedicel is also applied to the stem of the infructescence. The word "pedicel" is derived from the Latin ''pediculus'', meaning "little foot". The stem or branch from the main stem of the inflorescence that holds a group of pedicels is called a peduncle. A pedicel may be associated with a bract or bracts. In cultivation In Halloween types of pumpkin or squash plants, the shape of the pedicel has received particular attention because plant breeders are trying to optimize the size and shape of the pedicel for the best "lid" for a "jack-o'-lantern". Gallery File:Asclepias amplexicaulis.jpg, Long pedicels of clasping milkweed with a single peduncle File:314 Prunus avium.jpg, Cherr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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