achene

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Dandelion achenes, also called Dandelion clock.
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A microscopic view of a dandelion clock showing the pericarp and the achenes.
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Dandelion seeds (achenes) can be carried long distances by the wind.


An achene is a type of simple dry fruit produced by many species of flowering plants. Achenes are "monocarpellate" (formed from one carpel) and indehiscent (they do not open at maturity). Achenes contain a single seed that nearly fills the pericarp, but does not adhere to it. In many species, what we think of as the "seed" is actually an achene, a fruit containing the seed. Typical achenes are the fruits of buttercup, buckwheat, and dandelion. It is sometimes spelled "akene", and occasionally called "achenium" or "achenocarp."

The most familiar achenes are those of the strawberry, where the "seeds" are the achenes (technically the 'botanical' fruits), while what is eaten as the ('culinary') fruit is a so-called accessory fruit.

Fruits of sedges are sometimes considered achenes because they have a one-locule compound ovary. By the same definition, the common fruit type in the Family Asteraceae is also usually considered achene (some term the asteraceous achene cypsela, however). A sunflower "seed" in the husk is not really a seed, but an achene. The white-gray husks are the walls of the fruit.

A grain, a type of fruit closely resembling an achene, differs in that the pericarp is fused to the thin seed coat in the grain.

A winged achene, such as in maple, is a called a samara.

A utricle is like an achene, but it has a compound ovary, rather than a simple one. In addition, its fruit ovary becomes bladdery or corky.

A rose also produces achenes, which are nestled inside the rose hips (each rose hip, or the fruit, holds a few achenes).

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fruit has different meanings depending on context. In botany, a fruit is the ripened ovary—together with seeds—of a flowering plant. In many species, the fruit incorporates the ripened ovary and surrounding tissues.
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Magnoliophyta

Classes

Magnoliopsida - Dicots
Liliopsida - Monocots

The flowering plants or angiosperms are the most widespread group of land plants. The flowering plants and the gymnosperms comprise the two extant groups of seed plants.
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carpel is the outer, often visible part of the female reproductive organ of a flower; the basic unit of the gynoecium.

Carpel anatomy

The parts of the carpel are:
  • the stigma (from Ancient Greek stigma

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For other meanings of seed, see seed (disambiguation).


SEED

General
KISA
1998

Cipher detail
Key size(s):| 128 bits

Block size(s):| 128 bits
Nested Feistel network
16

SEED
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The Pericarp is the botanical term for the tissue surrounding a seed that develops from the ovary wall of the flower. Generally the pericarp is the fruit making body. This includes many types of fruits including nuts, but does not include a few fruits like figs.
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Ranunculus
L.

Species

over 400; see text

Ranunculus is a large genus of about 400 species of plants in the Ranunculaceae.
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F. esculentum

Binomial name
Fagopyrum esculentum
Moench

Buckwheat refers to plants in two genera of the family Polygonaceae, the Eurasian genus Fagopyrum
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This article may contain original research or unverified claims.
Please help Wikipedia by adding references. See the for details.
This article has been tagged since July 2007.

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Fragaria
L.

Species

20+ species; see text
The strawberry (Fragaria) is a genus of plants in the family Rosaceae and the fruit of these plants. There are more than 20 named species and many hybrids and cultivars.
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accessory fruit, false fruit, spurious fruit, epigynous fruit or pseudocarp is a fruit where the fleshy part is derived not from the ovary but from some adjacent tissue.

An example is the apple. Other examples include cashew and ficus.
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Cyperaceae
Juss.

Genera

See text.

The family Cyperaceae, or the sedge family, is a taxon of monocot flowering plants that superficially resemble grasses or rushes. The family is large, with some 4,000 species described in about 70 genera.
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H. annuus

Binomial name
Helianthus annuus
L.

The sunflower (Helianthus annuus
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GRAIN is an international non-governmental organization based in Barcelona, Spain, which works toward sustainable agriculture. It was formed upon the realization that the genetic diversity of the world's food crops has been drastically eliminated.
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Acer
L.

Distribution


Species
See List of Acer species

Trees or shrubs in the genus Acer are commonly called Maples.
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A samara is a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simple dry fruit and indehiscent (not opening along a seam).
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ROSE can mean:
  • Remote Operations Service Element, a sub-layer of protocol layer six in the OSI seven layer model. It provides SASE for remote operations.
  • Rush On Seven Episodes, a Massively Multiplayer Online Role Playing Game (MMORPG) that takes place on seven planets.

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