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Showing posts with label Rosoideae. Show all posts
Showing posts with label Rosoideae. Show all posts

Friday, December 31, 2010

Fruit

Rubus Berry Plants

Fruit


Fruit ~ Rubus Berry Plants
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Rubus Berry Plants

Rubus Berry Plants

Fruit

In broad terms, a Fruit is a structure of a Plants that contains its seeds.

The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain Plants that are sweet and edible in the raw state, such as apples, oranges, grapes, strawberries, juniper berries and bananas. seed-associated structures that do not fit these informal criteria are usually called by other names, such as vegetables, pods, nut, ears and cones.

In biology (botany), a "fruit" is a part of a Flowering plant that derives from specific tissues of the flower, mainly one or more ovaries. Taken strictly, this definition excludes many structures that are "fruits" in the common sense of the term, such as those produced by non-Flowering plants (like juniper berries, which are the seed-containing female cones of conifers), and fleshy fruit-like growths that develop from other plant tissues close to the fruit (accessory fruit, or more rarely false fruit or pseudocarp), such as cashew fruits. Often the botanical fruit is only part of the common fruit, or is merely adjacent to it. On the other hand, the botanical sense includes many structures that are not commonly called "fruits", such as bean pods, corn kernels, wheat grains, tomatoes, and many more. However, there are several variants of the biological definition of fruit that emphasize different aspects of the enormous variety that is found among plant fruits.

fruits (in either sense of the word) are the means by which many plants disseminate seeds. Most edible fruits, in particular, were evolved by plants in order to exploit animals as a means for seed dispersal, and many animals (including humans to some extent) have become dependent on fruits as a source of food. fruits account for a substantial fraction of world's agricultural output, and some (such as the apple and the pomegranate) have acquired extensive cultural and symbolic meanings.

Fungus also have fruit. When a Fungus begins to produce spores, the section of the fungus producing the spores is called the fruiting body of the fungus.

Simple fruit

Simple fruits can be either dry or fleshy, and result from the ripening of a simple or compound ovary in a flower with only one pistil. Dry fruits may be either dehiscent (opening to discharge seeds), or indehiscent (not opening to discharge seeds). Types of dry, simple fruits, with examples of each, are:

* achene - Most commonly seen in aggregate fruits (e.g. strawberry)
* capsule – (Brazil nut)
* caryopsis – (wheat)
* Cypsela - An achene-like fruit derived from the individual florets in a capitulum (e.g. dandelion).
* fibrous drupe – (coconut, walnut)
* follicle – is formed from a single carpel, and opens by one suture (e.g. milkweed). More commonly seen in aggregate fruits (e.g. magnolia)
* legume – (pea, bean, peanut)
* loment - a type of indehiscent legume
* nut – (hazelnut, beech, oak acorn)
* samara – (elm, ash, maple key)
* schizocarp – (carrot seed)
* silique – (radish seed)
* silicle – (shepherd's purse)
* utricle – (beet)

fruits in which part or all of the pericarp (fruit wall) is fleshy at maturity are simple fleshy fruits. Types of fleshy, simple fruits (with examples) are:

* berry – (redcurrant, gooseberry, tomato, cranberry)
* stone fruit or drupe (plum, cherry, peach, apricot, olive)
An aggregate fruit, or etaerio, develops from a single flower with numerous simple pistils.

* Magnolia and Peony, collection of follicles developing from one flower.
* Sweet gum, collection of capsules.
* Sycamore, collection of achenes.
* Teasel, collection of cypsellas
* Tuliptree, collection of samaras.

The pome fruits of the Family Rosaceae, (including apples, pears, rosehips, and saskatoon berry) are a syncarpous fleshy fruit, a simple fruit, developing from a half-inferior ovary.

Schizocarp fruits form from a syncarpous ovary and do not really dehisce, but split into segments with one or more seeds; they include a number of different forms from a wide range of families. Carrot seed is an example.


Related : Rubus
Related : Raspberry

Related : Fruit From Wikipedia, the free encyclopedia, Rubus Berry Plants
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Sunday, December 26, 2010

Rubus

Rubus Berry Plants

Rubus


Rubus Berry Plants
Picture Of

Rubus Berry Plants

Rubus Berry Plants

Rubus

Rubus is a large genus of Flowering plant in the rose family, Rosaceae, subfamily Rosoideae. Raspberries, blackberries, and dewberries are common, widely distributed members of the genus. Most of these Plants have woody stems with prickles like roses; spines, bristles, and gland-tipped hairs are also common in the genus. The Rubus fruit, sometimes called a bramble fruit, is an aggregate of drupelets.

The blackberries, as well as various other Rubus species with mounding or rambling growth habits, are often called brambles. However, this name is not used for those like the Raspberry that grow as upright canes, or for trailing or prostrate Species such as most dewberries, or various low-growing boreal, arctic, or alpine species.

The generic name means blackberry in Latin and was derived from the word ruber, meaning "red".

The genus Rubus is believed to have existed since at least 23.7 to 36.6 million years ago.

Examples of the hundreds, if not thousands, of Species of Rubus include:

* Rubus allegheniensis – Allegheny Blackberry
* Rubus arcticus – Arctic Raspberry
* Rubus armeniacus – Himalayan Blackberry
* Rubus caesius – European Dewberry
* Rubus canadensis – Canadian Blackberry
* Rubus chamaemorus – Cloudberry
* Rubus coreanus - Bokbunja
* Rubus cuneifolius – Sand Blackberry
* Rubus fruticosus agg. – Blackberry
* Rubus glaucifolius - San Diego Raspberry
* Rubus hayata-koidzumii (R. calycinoides) – Creeping Raspberry
* Rubus idaeus – European Red Raspberry
* Rubus laciniatus - Cutleaf Evergreen Blackberry
* Rubus lasiococcus - Roughfruit Berry
* Rubus leucodermis – Whitebark Raspberry or Western Raspberry
* Rubus occidentalis – Black Raspberry
* Rubus odoratus – Flowering Raspberry
* Rubus parviflorus – Thimbleberry
* Rubus parvifolius - Small-leaf Bramble (Australia)
* Rubus pensilvanicus – Pennsylvania Blackberry
* Rubus phoenicolasius – Wineberry
* Rubus saxatilis – Stone Bramble
* Rubus spectabilis – Salmonberry
* Rubus strigosus – American Red Raspberry
* Rubus trifidus - Japanese Blackberry
* Rubus ursinus – Trailing Blackberry

The genus also includes numerous hybrids, both natural and bred by man, such as the Loganberry (Rubus × loganobaccus).

See also: List of Lepidoptera that feed on Rubus


Scientific classification

The genus Rubus is a very complex one, particularly the blackberry/dewberry subgenus (Rubus), with polyploidy, hybridization, and facultative apomixis apparently all frequently occurring, making species classification of the great variation in the subgenus one of the grand challenges of systematic botany.

Rubus species have a basic chromosome number of seven. Polyploidy from the diploid (14 chromosomes) to the tetradecaploid (98 chromosomes) is exhibited.

Some treatments have recognized dozens of species each for what other, comparably qualified botanists have considered single, more variable species. On the other hand, species in the other Rubus subgenera (such as the raspberries) are generally distinct, or else involved in more routine one-or-a-few taxonomic debates, such as whether the European and American red raspberries are better treated as one species or two. (In this case, the two-species view is followed here, with Rubus idaeus and R. strigosus both recognized; if these species are combined, then the older name R. idaeus has priority for the broader species.)

Molecular data have backed up classifications based on geography and chromosome number, but following morphological data such as the structure of the leaves and stems do not appear to produce a phylogenetic classification.

The classification presented below recognizes 13 subgenera within Rubus, with the largest subgenus (Rubus) in turn divided into 12 sections. Representative examples are presented, but there are many more species not mentioned here.


Related : Rubus
Related : Raspberry

Related : Rubus From Wikipedia, the free encyclopedia, Rubus Berry Plants
Read more »

 
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