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Allocasuarina Humilis
''Allocasuarina humilis'', commonly known as the dwarf sheoak or dwarf casuarina, is a woody shrub of the family Casuarinaceae endemic to the south-west of Western Australia. Description Unlike many sheoaks which grow into trees, ''Allocasuarina humilis'' only reaches 20 cm to 2 m (8–80 in) in height. A many branched shrub, its branchlets ascend from larger branches and reach 12 cm (5 in) in length. As with other sheoaks, its foliage consists of slender green branchlets informally referred to as "needles" but more correctly termed cladodes. The cladodes are segmented, and the true leaves are tiny teeth encircling each joint. It can be dioecius or monecious. The reddish-brown male flower spikes are between 6 and 18 mm long and the warty cones are cylindrical, about 12 to 22 mm in length and 10 to 17 mm in diameter. Taxonomy Originally described as ''Casuarina humilis'' by German naturalists Christoph Friedrich Otto and Albert Gottfried Dietri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christoph Friedrich Otto
Christoph Friedrich Otto (4 December 1783 – 7 December 1856) was a German gardener and botanist. He was born in Schneeberg, Saxony. From 1805 to 1843 he was inspector of the Botanical Garden in Berlin. Together with Albert Gottfried Dietrich (1795–1856), he edited the ''Allgemeinen Gartenzeitung'' from 1833 until his death in 1856 in Berlin. The genus of plants ''Ottoa'' Alexander von Humboldt, H.Aimé Bonpland, B.Carl Sigismund Kunth, K. is named after him. As a taxonomy (biology), taxonomist, he was the binomial authority, binomial authority/co-authority of many species, including numerous plants within the family Cactaceae. Published works * ''Abbildung der fremden in Deutschland ausdauernden Holzarten'', 1819–1830 (with Friedrich Guimpel and Friedrich Gottlob Hayne). * ''Abbildungen auserlesener Gewächse des königlichen botanischen Gartens'', 1820–1828 (with Heinrich Friedrich Link) - Illustrations of plants from the royal botanical gardens. * ''Abbildungen neu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Sexuality
Plant reproductive morphology is the study of the physical form and structure (the Plant morphology, morphology) of those parts of plants directly or indirectly concerned with sexual reproduction. Among all living organisms, flowers, which are the reproductive structures of flowering plant, angiosperms, are the most varied physically and show a correspondingly great diversity in methods of reproduction. Plants that are not flowering plants (green algae, mosses, Marchantiophyta, liverworts, hornworts, ferns and gymnosperms such as conifers) also have complex interplays between morphological adaptation and environmental factors in their sexual reproduction. The breeding system, or how the sperm from one plant fertilizes the ovum of another, depends on the reproductive morphology, and is the single most important determinant of the genetic structure of nonclonal plant populations. Christian Konrad Sprengel (1793) studied the reproduction of flowering plants and for the first time it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laterite
Laterite is both a soil and a rock type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by intensive and prolonged weathering of the underlying parent rock, usually when there are conditions of high temperatures and heavy rainfall with alternate wet and dry periods. Tropical weathering (''laterization'') is a prolonged process of chemical weathering which produces a wide variety in the thickness, grade, chemistry and ore mineralogy of the resulting soils. The majority of the land area containing laterites is between the tropics of Cancer and Capricorn. Laterite has commonly been referred to as a soil type as well as being a rock type. This and further variation in the modes of conceptualizing about laterite (e.g. also as a complete weathering profile or theory about weathering) has led to calls for the term to be abandoned alto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murchison River (Western Australia)
The Murchison River is the second longest river in Western Australia. It flows for about from the southern edge of the Robinson Ranges to the Indian Ocean at Kalbarri. The Murchison-Yalgar-Hope river system is the longest river system in Western Australia. It has a mean annual flow of 208 gigalitres, although in 2006, the peak year on record since 1967, flow was 1,806gigalitres. Basin The Murchison River basin covers an area of about in the Mid West region of Western Australia. It extends about inland from the Indian Ocean, onto the Yilgarn Craton east of Meekatharra and north of Sandstone. Rain generally falls in the upper basin during summer cyclones, so for much of the year the Murchison River does not flow, leaving a dry sandy river bed and intermittent permanent pools. The eastern reaches of the basin contain large chains of salt lakes, which flow only following rainfall. The drainage lines from these lakes merge to form the Murchison River about north-northea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allocasuarina Fraseriana
''Allocasuarina fraseriana'', commonly known as western sheoak, common sheoak, WA sheoak. Fraser's sheoak or just sheoak, is a tree in the family Casuarinaceae. Endemic to Western Australia, it occurs near the coast in the south west corner of the State, from Jurien (30° S) to Albany (35° S). The Noongar peoples know the tree as kondil.condil, kulli or gulli. Description In ideal conditions, Western Sheoak grows to a height of about . Where exposed to salty coastal breezes, however, it is usually somewhat smaller. It usually has a diameter of at breast height. As with other ''Allocasuarina'' species, its "foliage" consists of slender green branchlets informally referred to as "needles" but more correctly termed cladodes. The cladodes are segmented, and the true leaves are tiny teeth encircling each joint. Male trees have small brown flower spikes at the end of branchlets. Flowering is prolific, giving male trees a rusty brown hue during flowering in late winter and e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allocasuarina Decussata
''Allocasuarina decussata'', commonly known as karri oak or karri she-oak, is a medium-sized tree, or more rarely a shrub, that is endemic to the south west of Western Australia. It is an understory tree in karri forest but also occurs as a stunted shrub in places like Bluff Knoll in the Stirling Range. Description Karri oak usually grows as a medium tree high, although in harsh, exposed situations in places like the top of Bluff Knoll it is a stunted shrub or poorly-formed tree in shrubland. As with other members of the family Casuarinaceae, the foliage consists of wiry green branchlets called cladodes with rings of minute leaf scales. In this species, the branchlets are about long, roughly square or X-shaped in cross section, with four scale-teeth in each ring. The rings of scale-leaves are apart. Separate male and female flowers form on the same individual plant. The fruiting structure is a woody cone, shaped like a short cylinder with its diameter roughly equal to or sli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allocasuarina Microstachya
''Allocasuarina microstachya'' is a species of flowering plant in the family Casuarinaceae and is endemic to the south-west of Western Australia. It is dioecious shrub that has its leaves reduced to scales in whorls of four, the mature fruiting cones long containing winged seeds long. Description ''Allocasuarina microstachya'' is a dioecious, intricately-branched shrub that typically grows to a height of . Its branchlets are up to long, the leaves reduced to scale-like teeth long, arranged in whorls of four around the needle-like branchlets. The sections of branchlet between the leaf whorls are mostly long, wide and more or less square in cross-section. Male flowers are arranged in spikes long, the anthers long. Female cones are sessile, the mature cones shortly cylindrical to oval, long and in diameter containing black, hairy, winged seeds long. Taxonomy This sheoak was first formally described in 1845 by Friedrich Anton Wilhelm Miquel who gave it the name ''Casuarina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allocasuarina Thuyoides
''Allocasuarina thuyoides'', commonly known as horned sheoak, is a species of flowering plant in the family Casuarinaceae and is endemic to the south-west of Western Australia. It is monoecious or dioecious shrub that has its leaves reduced to scales in whorls of five or six, the mature fruiting cones long containing winged seeds usually long. Description ''Allocasuarina thuyoides'' is a monoecious or dioecious, intricately-branched shrub that typically grows to a height of . Its branchlets are up to long, the leaves reduced to erect, scale-like teeth long, arranged in whorls of five or six around the needle-like branchlets. The sections of branchlet between the leaf whorls are mostly long, wide. Male flowers are arranged in whorls of up to four long on the ends of branchlets, the anthers long. Female cones are on slender peduncles long, the mature cones shortly cylindrical to spherical, long and in diameter containing winged seeds long. Taxonomy This sheoak was fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the Roman Republic it became the dominant language in the Italian region and subsequently throughout the Roman Empire. Even after the fall of Western Rome, Latin remained the common language of international communication, science, scholarship and academia in Europe until well into the 18th century, when other regional vernaculars (including its own descendants, the Romance languages) supplanted it in common academic and political usage, and it eventually became a dead language in the modern linguistic definition. Latin is a highly inflected language, with three distinct genders (masculine, feminine, and neuter), six or seven noun cases (nominative, accusative, genitive, dative, ablative, and vocative), five declensions, four verb conjuga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allocasuarina
''Allocasuarina'' is a genus of trees in the flowering plant family Casuarinaceae. They are endemic to Australia, occurring primarily in the south. Like the closely related genus ''Casuarina'', they are commonly called sheoaks or she-oaks. Wilson and Johnson distinguish the two very closely related genera, ''Casuarina'' and ''Allocasuarina'' on the basis of: *''Casuarina'': the mature samaras being grey or yellow-brown, and dull; cone bracteoles thinly woody, prominent, extending well beyond cone body, with no dorsal protuberance; *''Allocasuarina'': the mature samaras being red-brown to black, and shiny; cone bracteoles thickly woody and convex, mostly extending only slightly beyond cone body, and usually with a separate angular, divided or spiny dorsal protuberance. Description They are trees or shrubs that are notable for their long, segmented branchlets that function as leaves. Formally termed cladodes, these branchlets somewhat resemble pine needles, although sheoaks ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladode
Phylloclades and cladodes are flattened, photosynthetic shoots, which are usually considered to be modified branches. The two terms are used either differently or interchangeably by different authors. ''Phyllocladus'', a genus of conifer, is named after these structures. Phylloclades/cladodes have been identified in fossils dating from as early as the Permian. Definition and morphology The term "phylloclade" is from the New Latin ''phyllocladium'', itself derived from Greek ''phyllo'', leaf, and ''klados'', branch. Definitions of the terms "phylloclade" and "cladode" vary. All agree that they are flattened structures that are photosynthetic and resemble leaf-like branches. In one definition, phylloclades are a subset of cladodes, namely those that greatly resemble or perform the function of leaves, as in Butcher's broom (''Ruscus aculeatus'') as well as ''Phyllanthus'' and some ''Asparagus'' species. By an alternative definition, cladodes are distinguished by their limited gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Gottfried Dietrich
Albert Gottfried Dietrich (8 November 1795 – 22 May 1856) was a German botanist born in Danzig. Dietrich was curator at the Botanical Garden in Berlin and was an instructor at the institute of horticulture at Berlin-Schöneberg. From 1833 to 1856, with Christoph Friedrich Otto (1783–1856), he was publisher of ''Allgemeine Gartenzeitung'', a newspaper devoted to gardening. Publications * ''Terminologie der phanerogamischen Pflanzen…'', 1829 - Terminology of phanerogamic plants. * ''Flora regni borussici : flora des Königreichs Preussen oder Abbildung und Beschreibung der in Preussen wildwachsenden Pflanzen''; published 1833 by Verlag von Ludwig Ochmigke in Berlin, the fungi section (hefts and plates 373–396) are by Johann Friedrich Klotzsch. Flora regni borussic * ''Allgemeine Naturgeschichte und speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
