Dictionary » F » Flower



noun, plural: flowers

Sexual reproductive structure of plants, especially of angiosperms (flowering plants)


Flowers are plant structures involved in sexual reproduction. Thus, they are typically comprised of sexual reproductive structures (i.e. androecium and gynoecium) in addition to nonessential parts such as sepals and petals. And the presence/absence of these structures may be used to describe flowers and flowering plants (angiosperms).

Complete and incomplete flowers:
Flowers that have these four structures are called complete; those lacking in one or more of these structures are called incomplete. Many flowering plants produce conspicuous, colorfoul, scented petals in order to attract insect pollinators. There are plants, like grasses, that produce flowers that are less-conspicuous and lacking in petals. These plants do not require insects but rely on other agents of pollination, such as wind.

Perfect (bisexual) and imperfect (unisexual) flowers:
Flowers that have both male and female reproductive structures are called bisexual or perfect. Flowers that bear either male (androecium) or female reproductive structures (gynoecium) are referred to as unisexual or imperfect. With only one reproductive organ present, imperfect flowers are also described as incomplete flowers.

Regular and irregular flowers:
Flowers that display symmetry are described as regular flowers in contrast to irregular flowers that do not.

Monoecious and dioecious plants:
Plants may be described as monoecious or dioecious. A monoecious plant bears both male and female imperfect flowers. A dioecious plant is a plant producing only one type of imperfect flowers, i.e. male or female flowers. Therefore, a dioecious plant may either be a male or female plant depending on the flower they produce.


  • blossom
  • bloom

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Results from our forum

Agriculture and Microbiology come together (Research Prjct)

... to order. And I found a few textbooks that will be extremely beneficial in this pursuit, so I will get them at some point. I need to get a better flower light first though. Then sometime in the future I will start making my own nutes as well. Good natural soil contains: 30-50% sand 30-50% silt ...

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by Sophiahotep
Thu Nov 14, 2013 9:29 pm
Forum: Microbiology
Topic: Agriculture and Microbiology come together (Research Prjct)
Replies: 2
Views: 1275

Re: Is complexity inevitable?

... But if a plant dies out that ANY insect can pollinate, this engenders competition in all the insects, and if the plant was one of only a few flowering at a specific time it causes a large imbalance. In other words, the more separate food chains there are in an environment the better. If one ...

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by wildfunguy
Thu Sep 26, 2013 6:12 pm
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 4652


... a final example, take a system consisting of a plant and a single insect species that can pollinate it. If the insect becomes extinct, so will the flower. If the plant can accept various insects though, its risk of extinction is reduced. A system with one plant and one pollinator is clearly less ...

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by cakrit
Mon Aug 19, 2013 10:03 pm
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 4652

Flowers' selective pressure on plant-eating insects

... Biomedical Sciences FWI, but not actively engaged in the pursuit of evolutionary biology. I had an interesting thought about the mechanisms behind flower evolution. Basically, could it be that there has been selective pressure towards the evolution of flowers not only due to the most obvious reason ...

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by expuddle
Tue Jul 09, 2013 10:58 am
Forum: Evolution
Topic: Flowers' selective pressure on plant-eating insects
Replies: 2
Views: 2105

Structure of flower

Structure of Flower: Form Function Peduncle Flower stalk. Receptacle Part of flower stalk bearing the floral organs, at base of flower. Sepal Leaf-like structures at flower base, protects young flower bud. Calyx All the sepals together ...

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by snowfall
Thu May 30, 2013 5:29 pm
Forum: Botany Discussion
Topic: Structure of flower
Replies: 3
Views: 3970
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