flowering plants
Angiosperm derived characteristics
Flowers
The flowers, which are the reproductive organs of flowering plants, are The most remarkable characteristic that distinguishes them from other seed plants. angiosperm flowers help to enable a wider range of adaptability and expand the ecological niches available to them. This has allowed flowering plants to largely dominate terrestrial ecosystems.
Stamens with two pairs of pollen sacs
The stamens are much lighter than the corresponding organs of gymnosperms and have contributed to the diversification angiosperms through time with adaptations to specialized pollination syndromes, such as particular pollinators. The stamens are also become weather modification in order to prevent inbreeding, which has led to greater diversification, allowing angiosperms to eventually fill more niches.
Reduced male parts, three cells
The male gametophyte in angiosperms is significantly reduced in size by compared to those of gymnosperm seed plants. The smaller pollen decreases the time of pollination the pollen grain reaching the female plant to fertilization ovarian cancer; gymnosperms fertilization can occur up to one year after pollination, while in angiosperms the fertilization begins very soon after pollination. The shorter time leads to angiosperm plants setting seeds sooner and faster than gymnosperms, which is an evolutionary advantage.
carpel closed around the ovules (carpel or carpels and accessories may become the fruit)
The closed carpel of angiosperms also allows adaptations specialized pollination syndromes and controls. This avoids inbreeding, thus maintaining greater diversity. Once the ovary is fertilized the carpel and some surrounding tissues develop into a fruit. This fruit is often used as bait for seed dispersal animals. The cooperative relationship after another advantage to angiosperms in the process of dispersion.
Reduced female gametophyte, seven to eight cores cells
Reduced female gametophyte, like the reduced male gametophyte may be an adaptation for more rapid seed set, eventually leading to such flowering plant adaptations as annual herbaceous life cycles, flowering plants to fill even more niches.
Endosperm
Endosperm formation generally begins after fertilization and before the first division of the zygote. The endosperm is a tissue high nutritional value that can provide food for the developing embryo, cotyledons, and sometimes for the seedling when it first appears.
These distinguishing characteristics taken together have made the angiosperms the most diverse terrestrial plants and numerous, and the largest group in the trade to humans. The main exception to the dominance of terrestrial ecosystems by flowering plants is the coniferous forest.
Evolution
For Information: evolutionary history of plants # Flowers
Flowers Malus sylvestris (crab apple)
Land plants have existed for about 425 million years. Early land plants reproduced sexually with flagellated sperm swim like green algae from which they evolved. An adaptation terrestrialization has been the development of meiosporangia standing for spore dispersal to new habitats. This feature is absent in the progeny of closest to their family of algae, green algae Charophycean. A later adaptation land held with maintaining the delicate, avascular sexual stage, the gametophyte, in vascular tissues of the sporophyte. It has happened in the germination of spores in sporangia rather than the release of spores, as in non-seed plants. A current example of how this could have happened can be seen in the germination of spores in early Sellaginella, the spike-moss. Result for the ancestors of angiosperms was locking them in a case, the seed. The first plants bearing seeds, such as ginkgo, and conifers (like pines and firs), did not produce flowers. Interestingly, pollen grains (male) Ginkgo and cycads produce a pair of flagella, motile sperm that "Swim" in the pollen tube development in the female and her eggs.
The sudden appearance of relatively modern flowers in the fossil record poses a problem for the theory of evolution that has been called a mystery "abominable" by Charles Darwin. However, the fossil has experienced record growth since Darwin's time, and recently discovered angiosperm fossils such as Archaefructus, with other discoveries of fossil gymnosperms, suggest how angiosperm characteristics may have been acquired in a series of steps. Several groups of gymnosperms extinct seed ferns in particular, have been proposed as the ancestors of flowering plants, but there is no continuous fossil evidence evidence showing exactly how flowers evolved. Some older fossils, such as the upper Triassic Sanmiguelia, have been proposed. According to data today, some suggest that the ancestors of the angiosperms diverged from an unknown group of gymnosperms during the late Triassic (245202000000 years ago). A close relationship between angiosperms and Gnetophyta, proposed on the basis of morphological evidence, has more recently been challenged on the basis of molecular data that suggest Gnetophyta are rather more closely related to other gymnosperms.
The oldest known macrofossils trust identified as one of angiosperms liaoningense Archaefructus, is dated to about 125 million years (Cretaceous), while pollen considered as original takes angiosperm fossils back to about 130 million years. However, a study has suggested that the plant in early Jurassic Average Schmeissneria traditionally regarded as a type of ginkgo, perhaps sooner angiosperms known, or at least a close relative. In addition, the circumstantial evidence Chemical existence of angiosperms as early as 250 million years. Oleanane a secondary metabolite produced by many plants flowers, has been found in Permian deposits of this age with fossils gigantopterids. Gigantopterids are a group of extinct seed plant morphological share many traits of flowering plants, even if they are not known to have been themselves the flowering plants.
Recent DNA analysis (Molecular systematics) show that trichopoda Amborella, located on the Pacific island of New Caledonia, belongs to a sister group of other flowering plants, and morphological studies indicate that it has characteristics that may have been characteristic of early flowering plants.
The great angiosperm radiation, when a great diversity of angiosperms appear in the fossil record, occurred in the Cretaceous (about average 100 million years ago). However, a study in 2007 estimated that the division of the five most recent (the genus Ceratophyllum, Chloranthaceae the family, improving, the Magnoliids, and monocots) of the eight major groups produced about 140 million years. At the end of the Cretaceous appear to have dominated environments formerly occupied by the ferns and cycads, but forming a large canopy trees replaced conifers as the dominant trees nearly the late Cretaceous there are 65 million or even later, in early Tertiary. The radiation of herbaceous angiosperms occurred much later. Yet many fossil plants recognizable as belonging to modern families (including beech, oak, maple, and magnolia) seems already to late Cretaceous.
Two bee a flower head of Canada thistle, Cirsium arvense
It is generally accepted that the function of flowers, from the outset was to involve mobile animals in their reproduction processes. That is, the pollen can be dispersed, even if the flower is not bright or irregularly shaped in a way that attracts animals, but by spending the energy to create these features, angiosperms can get help from the animals and therefore reproduce more effectively.
Island genetics provides an explanation for the sudden fully developed appearance of flowering plants. Island genetics is considered a common source of speciation in general, especially when it comes to radical adaptations which seem to need less transitional forms. Flowering plants may have evolved in a isolated as an island or island chain, where the plants that bear them have been able to develop a relationship, with a highly specialized animal specific (a wasp, for example). Such a relationship with a hypothetical wasp carrying pollen from one plant to another very fig do today, could result in both the plant (s) and their partners developing a high degree of specialization. Note that the example wasp is not incidental, the bees, which apparently evolved specifically due to mutualistic plant relationships, are descendants of wasps.
Animals are also involved in the distribution of seeds. Fruit, which is formed by the enlargement of parts of the flower is often a tool for the dissemination of seeds that attracts animals to eat or disturb him, besides the distribution of seeds it contains (see frugivorous). Then that many such mutualistic relationships remain too fragile to survive competition and widespread bloom proved to be an unusual effective means of reproduction, distribution (whatever its origin) to become the dominant form of plant life of land.
Flower ontogeny uses a combination of genes normally responsible for forming new shoots. The most primitive flowers are regarded as having had a variable number of flower parts, often separate of (but in contact with) each other. The flowers would have tended to grow in a spiral, to be bisexual (in plants, which means both male and female parts on the same flower), and to be dominated by the ovary (female part). As flowers grew more advanced, some variations developing weldments, with a much more precise and design, and with both sexes specific flower or plant, or at least "ovary inferior.
Flower evolution continues today, the modern flowers have been so profoundly influenced by humans that some of them can not be pollinated in nature. Many modern, domestic flowers used to be simple weeds, which only germinate when the soil was disrupted. Some of them tend to grow with human crops, perhaps already symbiotic companion plant relationships with them, and the prettiest did not draw because of their beauty, developing a dependency and special adaptation human affection.
Classification
Angiosperms
Amborella
Nymphaeales
Austrobaileyales
Mesangiospermae
Chloranthaceae
Magnoliids
Ceratophyllum
monocots
improving
The current phylogeny of flowering plants.
There are eight groups of angiosperms life:
Amborella a single species of shrub of New Caledonia
Nymphaeales about 80 species of water lily and Hydatellaceae
Austrobaileyales about 100 species of woody plants from various regions of the world
Chloranthales several dozen species of aromatic plants with toothed leaves
Magnoliidae about 9,000 species, characterized by trimers flowers, pollen with one pore, and usually leaves branching-veined magnolia, for example, black pepper and bay
Monocotyledonae about 70,000 species, characterized by flowers trimers, a single cotyledon, pollen with a pore, and usually parallel-veined leaves of grasses, for example, orchids and palms
Ceratophyllum about 6 species of plants Water, perhaps more familiar as aquarium plants
Eudicotyledonae about 175,000 species, characterized by 4 – or 5 – mothers flowers, pollen three pores, and leaves usually branching-veined for example sunflower, petunia, buttercup, apples and oaks
The exact relationship between these eight groups is not yet clear, but it was determined that the first three groups to diverge from the ancestral angiosperm were Amborellales, Nymphaeales and Austrobaileyales. The term basal angiosperms refers to these three groups. The other five groups form the clade Mesangiospermae, with Chloranthales Magnoliidae and forming the basal mesangiosperms. Ceratophyllum appears with the group rather than improving the monocots.
Historical Classification
In 1736, an illustration of Linnaean classification.
The botanical term "angiosperm", ancient Greek, Angeon (container, boat), and (seeds), was invented in the form Angiospermae by Paul Hermann in 1690, as the name of that one of its main divisions of the plant kingdom. This included flowering plants possessing seeds enclosed in capsules, distinguished from his Gymnospermae, or flowering plants or schizoaffective achenial carpic fruit, the whole fruit or each of its pieces being here regarded as a seed and naked. The term and its antonym were maintained by Carolus Linnaeus with the same sense, but with limited application in the names of the orders of his class Didynamia. Its use with a modern approach to its scope only became possible after 1827, when Robert Brown established the existence of truly naked ovules in the Cycads and conifers, and to apply Gymnosperms name. From this time, as these Gymnosperms were, as usual, from dicotyledonous flowering plants, the angiosperms term has been used by botanical writers antithesis, with more or less extended, as a group name for other dicotyledonous plants.
Auxanometer: Measuring increase or growth rate of plants.
In 1851, Hofmeister discovered the changes occurring in the embryo sac of flowering plants, and determined the correct relationships of these fungi to. This fixed the position of Gymnosperms as a class distinct from Dicotyledons, and the term Angiosperm then little just to be accepted as the appropriate designation for all flowering plants other than Gymnosperms, including classes of broadleaf and monocots. This is the direction in which the term is used today.
In most taxonomies, the flowering plants are treated as a group consistent. The most popular descriptive name has been Angiospermae (Angiosperms), with Anthophyta ("flowering plants"), a second choice. These names are not related to a degree. The Wettstein system and the Engler system use the name, the grade assigned Angiospermae subdivision. The Reveal system treated plants Flower Magnoliophytina as subdivision (Frohne & U. Jensen ex Reveal, Phytologia 79: 70 1996), but later SPLIT to Magnoliopsida, Liliopsida and Rosopsida. System Cronquist and Takhtajan system treat this group to the rank of division, hence the name (Magnoliophyta family name Magnoliaceae). The Dahlgren system and the system Thorne (1992) deal with this group to the rank of class, leading to the name Magnoliopsida. However, the APG system of 1998 and the APG II system, 2003, does not treated as a formal taxon, but rather treat it as a clade without a formal botanical name and use the name for the angiosperm clade.
The internal classification this group has undergone considerable revision. The Cronquist system, proposed by Arthur Cronquist in 1968 and published in its complete form in 1981, is still widely used, but is no longer believed to accurately reflect phylogeny. A general consensus on how flowering plants should be arranged has recently begun to emerge through the work of the Angiosperm Phylogeny Group, who published an influential reclassification of the angiosperms 1998. An update incorporating more recent research has been published in APG II in 2003.
A monocot (left), and broadleaf
Traditionally, the flowering plants are divided into two groups, which in the Cronquist system are called Magnoliopsida (at the rank of class, consisting of Magnoliacae surname) and Liliopsida (at the rank of class, formed from the family name Liliaceae). Other descriptive names allowed by Article 16 Dicotyledones include the ICBN or dicotyledonous, and Monocotyledones or Monocotyledoneae, which have a long history of use. In English a member of each group can be called a dicotyledon (plural dicots) and monocot (plural monocots), or abbreviated as forbs (broadleaf plural) and monocots (plural monocots). These names come from the observation that the dicots most often have two cotyledons or embryonic leaves, in each seed. The monocots usually have only one, but the rule is not absolute either way. From a standpoint of diagnosis, the number of cotyledons is neither a particularly handy nor reliable character.
Recent studies by the CPA, show that the monocots constitute a monophyletic group or holophyletic, this clade is given the name monocots. However, the dicots are not (they are a paraphyletic group). However, in dicots a monophyletic group is called the improving or tricolpates, and whose most dicots. The name derives from a tricolpates type of pollen found widely in this group. The name is formed combining broadleaf improving with the prefix eu-(Greek for "good" or "good" Botanical indicating "true"), as increasing share traits traditionally attributed to the dicots, such as flowers, with four or five parts (four or five petals, four or five sepals). Separating this group of eudicots from the rest of the dicotyledons (old) leaves a remainder, are sometimes known informally palaeodicots (Greek prefix "palaeo-" means "old"). As this group is not monophyletic is a term of convenience only.
Flowering plant diversity
flower colors and shapes various
The number of species flowering plants is estimated at around 250,000 to 400,000. The number of families in APG (1998) was 462. In APG II (2003) is not resolved maximum is 457, but this number there are 55 separate option, so that the minimum number of families in this system is 402.
The diversity of plants flowers is not evenly distributed. Nearly all species belong to the eudicots (75%), monocots (23%) and magnoliid (2%) clades. The remaining 5 clades contain slightly more than 250 species in total, less than 0.1% of the diversity of flowering plants, distributed among 9 families.
Families all kinds of flowering plants in their constituencies APG for many species, are:
Asteraceae or Compositae (daisy family): 23,600 species
Orchidaceae (orchid family): 22,075 species
Fabaceae or Leguminosae (pea family): 19,400
Rubiaceae (madder family): 13,150
Poaceae or Gramineae (grass family): 10,035
Lamiaceae or Labiatae (Mint family): 7173
Euphorbiaceae (spurge family): 5735
Melastomataceae (melastomes family): 5005
Myrtaceae (myrtle family): 4620
Apocynaceae (dogbane family): 4555
The list above (showing only the 10 largest families), Orchidaceae and Poaceae are the families of monocots, other families are eudicots.
Vascular anatomy
Cross section of a flax stem angiosperms:
1. Pith,
2. Protoxylem,
3. Xylem I
4. Phloem I
5. Sclerenchyma (Bast fiber),
6. Cortex
7. Epidermis
The quantity and complexity of tissue-formation in flowering plants is higher that of gymnosperms. The vascular bundles of the stem are arranged so that the xylem and phloem form concentric rings.
In the Dicotyledons, beams in the very young stem are arranged in an open ring, separating a central pith from an outer cortex. In each bundle, separating the xylem and phloem, is a layer of meristem tissue or active training known as the cambium. The formation of a layer of cambium between the bundles (cambium interfascicular) a complete ring is formed, and a steady increase in the periodic results of the thickness of the developing xylem inside and outside the phloem. The soft phloem becomes crushed, but the hard wood persists and forms the major part of the stem and branches of the evergreen shrub. Because of differences in the nature of the evidence produced at the beginning and the end of the season timber is marked in cross section in concentric rings, one for each growing season, called annual rings.
Among the monocots, the beams are higher among young stem and are scattered throughout the ground tissue. They contain no cambium and once formed the stem increases in diameter only in cases exceptional.
The flowers, fruit and seeds
Flowers
Main Products: Flowers & Plants sexuality
A collection of flowers forming an inflorescence.
The feature of angiosperms is the flower. Flowers show remarkable variation in form and development, and provide the features most trusted external building relationships between species of angiosperms. The function of the flower is to ensure the fertilization of the ovum and development of fruit containing seeds. The floral apparatus may arise terminally on a shoot or leaf axil (where the petiole attaches to the stem). Sometimes, such as violets, a flower arises individually in the axils of ordinary leaf foliage. More generally, the flower-bearing part of the plant is sharply distinguished from the foliage-bearing or vegetative portion, and forms a more or less elaborate branch-system called an inflorescence.
The reproductive cells produced by flowers are of two kinds. Microspores, which divide to become pollen grains, are the "men" cells and are borne in the anther (or microsporophylls). The "female" cells called megaspores, which will divide to become the egg cell (Megasporogenesis), are contained in the ovule and enclosed in the carpel (or megasporophyll).
The flower may consist only of those parts as in willow, where each flower comprises only a few stamens or two carpels. Usually other structures are present and serve to protect the sporophyll and form an envelope attractive to pollinators. Individual members of these surrounding structures are known as sepals and petals (or tepals in flowers as Magnolia where sepals and petals are not distinguishable from each other). The external series (calyx of sepals) is usually green and leafy, and functions to protect the rest of the flower, including the bud. The internal series (corolla of petals) is generally white or color lively, and it is more delicate in structure. It works to attract pollinating insects or birds. Attraction is effected by the color, fragrance, and nectar, This may be secreted in some parts of the flower. The characteristics that attract pollinators account for the popularity of flowers and plants flowers in humans.
Although the majority of flowers are perfect or hermaphrodite (having both masculine and feminine parts of the structure flower), flowering plants have developed numerous morphological and physiological mechanisms to reduce or avoid inbreeding. heteromorphic flowers have short carpels and long stamens, or vice versa, so animal pollinators can not easily transfer pollen to the pistil part (receptive carpel). Homomorphic flowers may employ a biochemical (physiological) mechanism called self-incompatibility to distinguish between self pollen and non-self. In other species, the male and female parts are morphologically separated, developing on different flowers.
Fertilization and embryogenesis
Main article: Fertilization and embryogenesis of plants
Life Cycle of Angiosperms
Double fertilization refers to a process in which two sperm cells fertilize the cells of the ovary. This process begins when a pollen grain adheres to the stigma of the pistil (female reproductive structure), germinates and grows a long pollen tube. While the pollen tube is growing, a haploid cell generative travel in the tube behind the core tube. The generative cell divides by mitosis to produce two haploid (n) sperm. As the pollen tube grows He made his way to the stigma, down style and ovary. Here is the pollen tube reaches the micropyle of the ovule and digests its way into one synergid, the publication of its contents (including sperm). The synergid cells that were released into degenerates and sperm makes its way to fertilize the egg, producing a diploid (2n) zygote. The second sperm fuses with two central cell nuclei, produces a triploid (3n) cells. As the zygote develops into an embryo, the triploid cell develops into the endosperm, which serves as the supply Food embryo. The ovary is now developing into fruit and an egg will develop into seeds.
Fruits and Seeds
Article: seeds and fruits
The fruit of the Aesculus or Horse Chestnut tree.
As the development of the embryo and endosperm proceeds within the embryo sac, enlargement of the bag wall and combines with the nucellus (which is also the enlargement) and the integument to form the seed coat. The ovary wall develops to form the fruit or pericarp, whose form is closely related to the manner of distribution of seeds.
Frequently the influence of fertilization is felt beyond the ovary, and other parts of the flower to participate in fruit formation, for example, the floral receptacle in the apple, strawberry and others.
The character of the integument bears some relation to that of the fruit. They protect the embryo and aid dissemination, they can also directly promote germination. Among plants with indehiscent fruits, the fruit generally provides protection of the embryo and secures dissemination. In this case, the integument is poorly developed. If the fruit is dehiscent and the seed is exposed, the seed coat is usually well developed, and shall perform the functions otherwise performed by the fruit.
Economic Importance
Agriculture is almost entirely dependent on angiosperms, either directly or indirectly through livestock feed. Of all the plant families, Poaceae, or grass family, is by far the most important, providing the bulk of all feedstocks (corn oats rice, corn, wheat, barley, rye, millet, sugarcane, sorghum). The Fabaceae, or legume family, comes in second place. Also very important are the Solanaceae, or nightshade family (potatoes, tomatoes, peppers and, among others), gourds or gourd family (also including pumpkins and melons), the Brassicaceae or mustard family of plants (Including rape and cabbage), and the Apiaceae, or parsley family. Many of our fruits come from the Rutaceae, or Rue family, and the family Rosaceae, or pink family (including apples, pears, cherries, apricots, plums, etc.).
In some parts of the world, certain single species assume paramount importance because of their wide variety of uses, such as coconut (Cocos nucifera) on Pacific atolls, and the olive tree (Olea europaea) in the Mediterranean region.
Flowering plants also provide economic resources in the form of wood, paper, fiber (cotton, flax and hemp, among others), drugs (digitalis, camphor), decorative and landscaping plants, and many other uses. The main area where they are overwhelmed by other plants is timber production.
See also
List of flowers
References
^ Lindley, J (1830). Introduction to the natural system of botany. London: Longman, Rees, Orme, Brown and Green. XXXVI.
^ Cantino, Philip D. and James A. Doyle, Sean W. Graham Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela Soltis S., & Michael J. Donoghue (2007). "Towards a phylogenetic nomenclature Tracheophytes. Taxon 56 (3): E144.
^ Lindley, D (2000). "The role of mesofossils http://www Middle Paleozoic to early detection of bryophytes. Philos Trans R Soc Lond B Biol Sci 355 (1398): 733 755 .. DOI 10.1098/rstb.2000.0613:. PMID 10905607. PMC 1692787 .. pubmedcentral.nih.gov / articlerender.fcgi? artid = 1692787.
^ Abominable mystery Darwin: Insights from a supertree of the angiosperms. Proceedings of the National Academy of Sciences of the United States of America. Jonathan T. Davies, Timothy G. Barraclough, Mark W. Chase, Pamela S. Soltis, Douglas E. Soltis, and Vincent Savolainen. Published (online) February 6, 2004.
Sun ^ Nixon, G., Q. Ji, DL Dilcher, S. Zheng, KC & X. Wang 2002. Archaefructaceae, a New Basal Angiosperm Family. Science 296 (5569): 899,904.
Wing Xin ^; Shuying Duan, Geng Baoyin, Jinzhong Cui Yong Yang (2007). "Schmeissneria: the missing link to angiosperms?". BMC Evolutionary Biology 7: 14. DOI: 10.1186/1471-2148-7-14.
Taylor ^ Winship David, Hongqi Li, Jeremy Dahl, Fred J. Fago, Zinniker David, and J. Michael Moldowan (March 2006). "Evidence of biogeochemical presence of angiosperms molecular fossil oleanane Paleozoic and Mesozoic non-angiosperm fossils. "Paleobiology 32 (2): 179190. doi: 10.1666/0094-8373 (2006) 32 [179: BEFTPO] 2.0.CO; 2. doi: 10.1666/0094-8373 (2006) 32 [179: BEFTPO] 2.0. CO 2.
^ Fat Fossils provide clues to the evolution of flowers ScienceDaily (Apr. 5, 2001)
Flower ^ Transcripts first nova PBS release date: April 17, 2007
^ Angiosperm Amborella not a "base"? Not so fast – Soltis and Soltis 91 (6): 997 – American Journal of Botany
^ From the South Pacific plant may be the missing link in the evolution of plants Flower Public Release Date: 17-May-2006
^ Using data from the plastid genome-scale to solve the enigmatic relationship between basal angiosperms-Communicated by David L. Dilcher, University of Florida, Gainesville, FL, August 28, 2007 (received for review June 15, 2007) PNAS
^ Wilson Nichols Stewart & Gar W. Rothwell, Paleobotany and the evolution of plants, 2nd ed. Cambridge Univ. Press, 1993 498
^ Uphill question about the evolution of flowers Answers 15-Jun-2001
^ Human Affection Altered Evolution of Flowers by Robert Roy Britt, LiveScience Senior Writer (posted: May 26, 2005 6:53 ET)
^ Abcdef Jeffrey D. Palmer, Douglas E. Soltis and Mark W. Chase, Chase, MW (2004). Figure 2. "Planting trees of life: an overview and some points of view. " American Journal of Botany 91: 14371445. DOI: 10.3732/ajb.91.10.1437. http://www.amjbot.org/cgi/content/full/91/10/1437/F2.
^ Pamela S. And Douglas E. Soltis Soltis (2004). "The origin and diversification of angiosperms. American Journal of Botany 91: 16141626. DOI: 10.3732/ajb.91.10.1614. http://www.amjbot.org/cgi/content/full/91/10/1614.
^ Angiosperm Phylogeny Group ABC (2003). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Botanical Journal of the Linnean Society 141: 399436. DOI: 10.1046/j.1095-8339.2003.t01-1-00158.x. http://www.blackwell-synergy.com/links/doi/10.1046/j.1095-8339.2003.t01-1-00158.x/full/.
^ Thorne, RF (2002). "How many species of seed plants are there?". Taxon 51 (3): 511 522. DOI: 10.2307/1554864. http://www.ingentaconnect.com/content//iapt/tax/2002/00000051/00000003/art00009. "
^ Scotland, RW & Wortley, AH (2003). "How many species of seed plants are there?". Taxon 52 (1): 101104. DOI: 10.2307/3647306. http://www.ingentaconnect.com/content/iapt/tax/2003/00000052/00000001/art00011.
^ Govaerts, R.url = http://www.ingentaconnect.com/content/iapt/tax/2003/00000052/00000003/art00016+ (2003). "How many species of seed plants are there? A response". Taxon 52 (3): 583 584. DOI: 10.2307/3647457.
^ Abcdefghi Stevens PF (2001 onwards). "Angiosperm phylogeny website (at the Missouri Botanical Garden). Http://www.mobot.org/MOBOT/Research/APweb/welcome.html.
Scientific ^ Kew 30 (October 2006). http://www.kew.org/kewscientist/ks_30.pdf.
References
Wikimedia Commons has media related to: Magnoliophyta
Wikipedia has information related to: Magnoliophyta
The Wikibook dichotomous key has a page on the theme
Magnoliophyta
Cronquist, Arthur. (1981) An integrated system of classification of flowering plants. Columbia Univ. Press, New York.
Dilcher, D. 2000. Towards a new synthesis: Major development trends in the fossil record of angiosperms. PNAS Proceedings [of the National Academy of Sciences of the United States of America] 97: 7030-7036 (Available online here)
Heywood, VH, zoology, and Culham, A. & Seberg, O. (2007). Families of flowering plants in the world. Richmond Hill, Ontario, Canada: Firefly Books. ISBN 1-55407-206-9.
Flowering plants of the earliest known genes identified by William J. Cromie, Harvard Gazette, December 16, 1999.
L. Watson and MJ Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval.
Simpson, MG plant systematics. Elsevier Academic Press. 2006.
Raven, PH, RF Evert, SE Eichhorn. Biology of Plants, 7th edition. WH Freeman. 2004.
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Lycopodiophyta
Isoetopsida (Isoetales, Selaginellales) Lycopodiopsida (Lycopodiales)
Euphyllophyta
Moniliformopses (Equisetopsida, Filicopsida, Psilotopsida)
Spermatophyta: Gymnospermae (Pinophyta, cycads, Ginkgophyta, Gnetophyta) Magnoliophyta
See also: List of plant orders
Categories: Angiosperms | Plant Taxonomy Plant | | Pollination | Plant sexualityHidden categories: Articles needing cleanup September 2009 | All articles related cleaning | Wikipedia introduction from September 2009 | All articles lacking sources | stubs from February 2010 | Wikipedia incorporating the text of the 1911 Britannica Encyclopdia About the Author
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The Checkmates – Black Pearl – My Tribute
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Black Pearls Journal $12.95 A beautifully designed diary with quotes from the national bestseller Black Pearls, with space to record your own daily meditations, reflections, aspirations, and plans inspired by the timeless wisdom of people of African descent. Includes 365 quotes on a wide rage of topics that concern African Americans. Two color throughout. Concealed wire-o binding…. |
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The uncertain fate of Venezuela’s black pearl: the petrostate and its ambiguous oil and gas legislation.: An article from: Houston Journal of International Law $9.95 This digital document is an article from Houston Journal of International Law, published by Houston Journal of International Law on June 22, 2010. The length of the article is 22814 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.Citation DetailsTitle: T… |
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POMONA [Winter 1988, Vol. XXI No. 1 (Pomona, Journal of the North American Fruit Explorers (NAFEX), Volume XXI) PARTIAL list of contents: Golden Spice [Pear] Defended by Charles A. Putensen; Importing Plants; Where Have All the Si-Yons Gone? by Joe Callizo; An Open Letter to University and Government Researchers; Further Explorations of the Weschcke Nut Grove by Tom Plocher; Scugog Apple Located by Don Sirkholz; A Bit of History of the Swenson Grape Hybrids by Elmer Swenson; Butia Capitata by Ray Givan; Rib… |
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