Flower Ovary
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Ovary
Collectively the ovary, style and stigma make up the femaleparts of the flower. This is variably called a carpel, pistil orgynoecium.
Flower Parts
Stigma
Style
Ovary
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Ovary
Flower Parts
The ovary is derived from one to many carpels that contain the ovules.The ovary becomes the fruit, carpels are usually indicative of thenumber of locules in the fruit and the ovules become the seeds withinthe locules.
Ovary with fivecarpels.
Ovary withthree carpels.
Ovules
Locule
Ovary
Sarracenia Lillium
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Ovary position
Flower Parts
The position of the ovary is characteristic of different plant families.The ovary can be above the other flower parts, below the flower partsor held up on a special structure called a hypanthium.
Superior(Hypogynous)
Intermediate(Perigynous)
Inferior(Epigynous)
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Ovary position
Flower Parts
A hypogynous flower has a superior ovary that is above the otherflower parts. St. Johns wort is a good example of this type of ovaryposition.
Superior(Hypogynous)
St. Johns wort(Hypericum)
Stamens
Petals
Ovary
Sepals
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Ovary position
Flower Parts
A perigynous flower is characterized by having a receptacle cup(hypanthium) that surrounds the ovary. The floral parts initiate fromthis cup.
Intermediate(Perigynous)
Balloonflower (Platycodon)
Stamens
Petals
Ovary
Sepals
Hypanthium
Flower in the bud Open flower
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Ovary position
Flower Parts
A epigynous flower has an inferior ovary. Evening primrose nicely showsthe separation between the ovary and the other flower parts.
Inferior(Epigynous)
Evening primrose(Oenothera)
Stamens
Fuschia (Fuschia)
Petals
Stamens
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Ovary placentationOvules are arranged in patterns within the ovary on placental connections.
Axile
Free centralParietal
Flower Parts
Basal
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Basal placentation
In basal placentation, the ovule is located at the base of the ovary. The ovaryoften comprised of a single chamber called a locule.
Linden Tilia tomentosa
Ovule
Placenta
Ovary
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Basal placentation
When the ovule is located at the pedicel end of the ovary it is termed erect andwhen the ovule is located at the opposite end of the ovary it is termed pendulous.
Linden Tilia tomentosa
Ovule
Cherry Prunus cerasus
Erect placentation Pendulous placentation
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Basal placentation
At first glance, many aggregate fruits appear to have free central or axialplacentation. However, aggregate fruits are actually groupings of attachedindividual ovaries usually with a single ovule often with basal placentation.
Ovule
Ovary
Sweet gum Liquidambar styricaflua Sweet bay Magnolia glabra
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Parietal placentation
In parietal placentation, the ovule is attached to the ovary wall. The simplestform is seen in the pod where ovules are attached along one edge of the ovary.
Ovule
Placenta
Ovary
False indigo Baptisia pendula
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Parietal placentation
In a developing peony pod you can clearly see the ovules on short placentaattached in rows on the folded edge of the ovary. You can also clearly seethat there are no partitions in the ovary (a single locule).
Peony Paeonia officinalis
Ovule
Placenta
Ovary
Flower Parts
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Parietal placentation
In the chelondine poppy, three rows of ovules attach at three locations on theovary. In this case, ovules have a very short placenta.
Chelondine poppy
Stylophorum diphyllum
Ovule
Placenta
Ovary
Aborted ovule
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Parietal placentation
Cactus can appear to have a riot of ovules in the ovary because they are borne onlong placentas. If you look closely, you will see that the placentation is parietal.
Cactus Echinopsis
Ovule
Placenta
Ovary
Aborted ovule
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Axile placentation
In Axile placentation, ovules are attached to a central axis in an ovary withnumerous partitions called locules.
Ovule
Locule
Ovary
Day lily HemerocallisPlacenta
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Axile placentation
In Axile placentation, ovules are attached to a central axis in an ovary withnumerous partitions called locules.
Ovule
Locule
Ovary
Day lily Hemerocallis
Central axis
Petals
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Axile placentation
Ovaries with three locules in axile placentation are typical of monocots.
Iris
Lily Lillium
Amazon Lily Eucharis
Tulip Tulipa
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Axile placentation
Foxglove is an example of an ovary with two fused carpels and two locules withaxile placentation.
Ovule
Ovary
Foxglove DigitalisCentral axis
LoculesDeveloping ovary Nearly mature ovary
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Axile placentation
Dicots typically have two, four, five , or more locules within an ovary.
Sarracenia
Love-in-a-mist Nigella
Pitcher plant
Balloon flower Platycodon
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Fl P
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Axile placentation
Blueberry shows the typical star-shape seen in many fleshy ovaries that willbecome berries. The star-shape is created by the axine placentation but theindividual locules can be difficult to see in the fleshy fruit.
Ovule
Ovary
Central axis
Blueberry Vaccinium
Flower Parts
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Fl P
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Axile placentation
In kiwi fruit there is a high percentage of fertilized ovules with many ovulesper locule and many locules. In serviceberry There are only two ovules perlocule and most of the ovules have aborted due to lack of fertilization exceptfor a pair in one locule.
Ovule
Ovary
Serviceberry Amelanchier
Central axis
Kiwi Actinidia
AbortedOvules
Locule
Flower Parts
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Parietal and Axile PlacentationThe placenta in some ovaries can be elaborate and extend into the locule. Although
similar in appearance St. Johns wort ovaries have a single locule with parietalplacentation and monkey flower has two locules making its placentation axile.
Monkey flower Mumulus
Ovule
Placenta
Ovary
St Johns wort Hypericum
Locule
Ovule
Placenta
Ovary
Locule
Parietal Axile
Flower Parts
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8/22/2019 Flower Ovary
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Free central placentation
In free central placentation, ovules are attached to a central axis in an ovarywith only a single locule.
Ovule
Central axis
Ovary
Shooting star Dodecatheon
Flower Parts
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Next Back to ovarymenu
Main menu
Back to mainflower menu
Fl P
http://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Initialmainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Initialmainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdf -
8/22/2019 Flower Ovary
24/24
Free central placentation
Shooting star has an ovary of five fused carpels as a single locule. Ovules areproduced just below the ovary wall.
Ovule
Ovary
Shooting star Dodecatheon
Central axis
Flower Parts
Back to flowerparts menu
Back to ovarymenu
BackBack to mainflower menu
http://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowermainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Initialmainpage.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_11/Flowerparts.pdf