To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

In a pomegranate flower, Punica granatum, the petals, except for their fused bases, soon fall. The hypanthium with sepal lobes and stamens still attached develops to form the outer layer of the fruit.

In angiosperms, a hypanthium or floral cup[1][2][3] is a structure where basal portions of the calyx, the corolla, and the stamens form a cup-shaped tube. It is sometimes called a floral tube, a term that is also used for corolla tube and calyx tube.[citation needed] It often contains the nectaries of the plant. It is present in most flowering species, although varies in structural dimensions and appearance.[4] This differentiation between the hypanthium in particular species is useful with identification. Some geometric forms are obconic shapes as in toyon, whereas some are saucer-shaped as in Mitella caulescens.

Its presence is diagnostic of many families, including the Rosaceae, Grossulariaceae, and Fabaceae. In some cases, it can be so deep, with such a narrow top, that the flower can appear to have an inferior ovary - the ovary is below the other attached floral parts. The hypanthium is known by different common names in differing species. In the eucalypts, it is referred to as the gum nut; in roses it is called the hip.

YouTube Encyclopedic

  • 1/5
    Views:
    14 353
    757
    65 925
    938
    33 433
  • Rose hips: free vitamin C - and how to make itching powder :)
  • Rosa - Rosaceae - roses, rose hips
  • How to Grow Roses and other Flowers in a GreenHouse - for Export - TvAgro por Juan Gonzalo Angel
  • Eucalyptus Pellita Seeds India [ Red Mahogany] [Supplier & Exporter]
  • AutoCAD 2015: Cálculo e desenho da inclinação de telhados

Transcription

Contents

Variations in plant species

 Ovary superior to hypanthium
Ovary superior to hypanthium
 In Spiraea the hypanthium supports a nectar-producing "disk" which is ring-shaped and may have lobes as it does here. The stamens arise between the petals and the disk.
In Spiraea the hypanthium supports a nectar-producing "disk" which is ring-shaped and may have lobes as it does here. The stamens arise between the petals and the disk.
 Hypanthum in Rosa
Hypanthum in Rosa
 Narcissus pseudonarcissus, showing from the upper bend to the tip of the flower: spathe, ovary, hypanthium, tepals, corona
Narcissus pseudonarcissus, showing from the upper bend to the tip of the flower: spathe, ovary, hypanthium, tepals, corona

In myrtles the hypanthium can either surround the ovary loosely or tightly; in some cases it can be fused to the walls of the ovary. It can vary in length. The rims around the outside of the hypanthium contain the calyx lobes or free sepals, petals and either the stamen or multiple stamen that are attached at one or two points. The flowers of the Rosaceae family always have some type of hypanthium or at least a floral cup from which the sepals, petals and stamens all arise. In the Rosaceae family, or the rose family, the hypanthium is lined with nectar-producing tissue known as nectaries. The nectar is a sugary substance that attracts birds and bees to the flower, who then take the pollen from the lining of the hypanthium and transfer it to the next flower they visit, usually a neighbouring plant.[5]

The stamens borne on the hypanthium are the pollen-producing reproductive organs of the flower. The hypanthium helps in many ways with the reproduction and cross pollination pathways of most plants. It provides weather protection and a medium to sustain the lost pollen, increasing the probability of fertility and cross-pollination.[6] The retained pollen can then attach to pollinators such as birds, bees, moths, beetles, bats, butterflies and other animals. Wind can act as an instigator for fertilisation. The hypanthium is also an adaptive feature for structural support. It helps the stem fuse together with the flower, in turn strengthening the bond and overall stability and integrity.[7]

References

  1. ^ Foster 2014, Hypanthium.
  2. ^ Beentje, H.; Williamson, J. (2010). The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms. Royal Botanic Gardens, Kew: Kew Publishing. 
  3. ^ Hickey, M.; King, C. (2001). The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press. 
  4. ^ Cronquist 1981.
  5. ^ Givnish 1997.
  6. ^ Clarke 2004.
  7. ^ Snow 2003.

Bibliography

Books

  • Cronquist, Arthur (1981), An integrated system of classification of flowering plants, Columbia University Press, ISBN 978-0-231-03880-5 
  • Givnish, Thomas J (1997), Molecular evolution and adaptive radiation, Cambridge University Press, ISBN 978-0-521-57329-0 
  • Snow, Neil Wilton (2003), Systematics of Austromyrtus, Lenwebbia, and the Australian species of Gossia (Myrtaceae), American Society of Plant Taxonomists, ISBN 978-0-912861-65-4 
  • Faegri, Knut; Iversen, Johannes, 1904- (1975), Textbook of pollen analysis (3rd rev. ed.), Hafner Press, retrieved 8 November 2013 
  • Clarke, Andrew (2004). The AgLaw papers. Armidale, N.S.W: Australian Centre for Agriculture and Law. ISBN 9781863898737. 

Websites

Foster, Tony. "Botany Word of the Day". Phytography. Retrieved 27 November 2014. 

External links

  • Hypanthium images on MorphBank, a biological image database
This page was last edited on 23 December 2016, at 22:18.
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.