Amaryllis style and stigmas

A carpel is the female reproductive organ of a flower; the basic unit of the gynoecium. The parts of the carpel are: Image File history File links Amaryllis_stigma. ... Image File history File links Amaryllis_stigma. ... The hand mirror and comb of the Roman Goddess Venus is often used to represent the female sex. ... A Phalaenopsis flower A flower, (<Old French flo(u)r<Latin florem<flos), also known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Magnoliophyta, also called angiosperms). ... A gynoecium(gyne: woman) is the female reproductive part of a flower, the male part of a flower is called androecium. ...

• the stigma (plural: stigmas), usually the terminal (end) portion that has no epidermis and is fitted to receive pollen (male gametes); it is commonly somewhat glutinous or viscid;
• the style, a stalk connecting the stigma with the ovary below containing the transmitting tract, which facilitates the movement of the male gamete to the ovule; and
• the ovary (also called a megasporophyll) containing the female reproductive cell or ovule.

The carpel (if single) or carpels (if fused) comprise the pistil of the flower. A flower with two or more fused carpels (called a compound ovary or compound pistil) is termed syncarpous. However, if the gynoecium consists of more than one distinct carpel, it will have more than one pistil and is then termed apocarpous. Apocarpous also pertains to any flower with a single carpel. Fertilization of the ovule or ovules results in development of the carpel(s) into a fruit. The epidermis is the outer multi-layered group of cells covering the leaf and young tissues of a plant. ... SEM image of pollen grains from a variety of common plants: sunflower (Helianthus annuus), morning glory (Ipomoea purpurea), hollyhock (Sidalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and castor bean (Ricinus communis). ... Gametes, from the ancient Greek γαμετης (spouse), are the specialized germ cells that come together during fertilization (conception) in organisms that reproduce sexually. ... Ovary in plants is the female part of a flower. ... An ovule is a structure found in seed plants that develops into a seed after fertilization. ... The Pistil is the part of the flower made up of one or more carpels. ... Fruit stall in Barcelona, Spain. ...

Flowers and fruit (capsules) of the ground orchid, Spathoglottis plicata, illustrating an inferior ovary.

The gynoecium, the collective term for all the carpels, is the innermost whorl of the parts of a flower, and in many flowers the other parts (sepals, petals, and stamens) are attached to the receptacle beneath the gynoecium. In such cases, where the ovary lies above the attachments of the other distinct floral parts, the flower is described as hypogynous or as having a superior ovary. In some species (examples include plum, cherry, and blackberry), the other (noncarpellary) floral parts are fused to form a cup called a floral tube or hypanthium. In these flowers, the ovary lies physically lower than the lobes of the sepals and petals and below the point of attachment of the stamen filaments — the ovary is still considered to be superior but the flower is termed perigynous. Raceme of flowers through fruit sequence in the orchid, Spathoglottis plicata Blume taken by Eric Guinther (December 2003) and released under the GNU Free Documentation License. ... Raceme of flowers through fruit sequence in the orchid, Spathoglottis plicata Blume taken by Eric Guinther (December 2003) and released under the GNU Free Documentation License. ... A Phalaenopsis flower A flower, (<Old French flo(u)r<Latin florem<flos), also known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Magnoliophyta, also called angiosperms). ... Plum is also a nickname for British humorist P.G. Wodehouse. ... Species Several, including: Prunus apetala Prunus avium (Wild/Sweet Cherry) Prunus campanulata Prunus canescens Prunus cerasus (Sour Cherry) Prunus concinna Prunus conradinae Prunus dielsiana Prunus emarginata (Bitter Cherry) Prunus fruticosa Prunus incisa Prunus litigiosa Prunus mahaleb (Saint Lucie Cherry) Prunus maximowiczii Prunus nipponica Prunus pensylvanica (Pin Cherry) Prunus pilosiuscula Prunus... The BlackBerry is a wireless handheld device introduced in 1999 which supports push e-mail, mobile telephone, text messaging, internet faxing, web browsing and other wireless information services. ...

In those flowers in which the floral tube is fused with the ovary, the sepals, petals, and stamens appear to grow out from the top of the ovary, and the flower is said to be epigynous and have an inferior ovary. Examples of plant families with inferior ovaries include orchid, sunflower, and cactus. The position of the ovary is an important consideration in the identification and classification of plant species, as well as the kind of fruit that develops after fertilization. Orchid re-directs here; for alternate uses see Orchid (disambiguation) Genera Over 800 See List of Orchidaceae genera. ... Bold text // Strike-through text For other uses, see Sunflower (disambiguation). ... Wikipedia:Translation/Cactus Genera See Taxonomy of the Cactaceae The name cactus, plural cacti or cactuses, has been traditionally given to any member of the flowering plant family Cactaceae. ...

Carpel anatomy

The carpel of a simple apocarpous gynoecium appears as a folded structure, differentiated into a basal fertile part (ovary) and an upper sterile part (style). Various interpretations of the origin from a leaf-like structure have been made (Esau, 1965), but the important anatomical description is that of a variously folded tissue surrounding a cavity (called a locule) within which projects one or more ovules, attached by or along a placenta. Typically, a carpel has two placentae. An example of a simple carpel is that of a pea, bean or Arabidopsis: the fruit develops from the single carpel consisting of two rows of ovules aligned beside one another along the placental margin. Binomial name Pisum sativum L. A pea is the small, edible round green bean which grows in a pod on the leguminous vine Pisum sativum, or in some cases to the immature pods. ... Green beans Bean is a common name for large plant seeds of several genera of Fabaceae (formerly Leguminosae) used for food or feed. ... Species See text. ...

When two or more carpels are fused or joined together its called syncarpy. In a compound pistil, the carpels are fused together in one of two basic ways:

• the carpels are fused at or near their margins (parietal placentation), usually forming a single large cavity — an example would be the violet.
• the folded carpels extend in towards the center, being fused along their outer faces (laterally concrescent), with the placentae arranged around a central column of tissue (axile placentation). There may be as many locules as there are carpels; and tissue of the receptacle may be involved in forming the axillary column. An example of axile placentation would be the lily.

A complicating factor in all of this is the fact that in some species syncarpy is present only at the base of the carpels, the pistil being apocarpous in the upper part. The manner of fusing of the carpels can also vary from one part of the pistil to another. Species List of Viola species Violets (Viola) are a genus of flowering plants in the family Violaceae, with around 400-500 species throughout the world, mainly in the temperate Northern Hemisphere but also in Hawaii, Australasia, and the Andes in South America. ... Species See text The plants of the genus Lilium are the true lily plants, comprising a genus of about 100 species in the lily family, Liliaceae. ...

The ovule

Longitudinal section of female flower of squash showing ovary, ovules, pistil, and petals

The ovule, which represents the megasporangium, when mature, consists of one or two coats surrounding the central nucellus, except at the apex where an opening, the micropyle, is left. The nucellus is a cellular tissue enveloping one large cell, the embryo-sac or megaspore. The germination of the megaspore consists in the repeated division of its nucleus to form two groups of four, one group at each end of the embryo-sac. One nucleus from each group, the polar nucleus, passes to the centre of the sac, where the two fuse to form the so-called definitive nucleus. Of the three cells at the micropylar end of the sac, all naked cells (the so-called egg-apparatus), one is the egg-cell or oosphere, the other two, which may be regarded as representing abortive egg-cells (in rare cases capable of fertilization), are known as synergidae. The three cells at the opposite end are known as antipodal cells and become invested with a cell-wall. Longtitudinal section of female flower, courgette Image taken by me, released under GFDL Pollinator 05:37, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Longtitudinal section of female flower, courgette Image taken by me, released under GFDL Pollinator 05:37, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...

Miscellaneous

The spice saffron is taken from the stigma of the saffron crocus, Crocus sativus. Binomial name Crocus sativus L. Saffron (IPA: ) is a spice derived from the flower of the saffron crocus (Crocus sativus), a species of crocus in the family Iridaceae. ... Species See text. ...

References

• Esau, K. 1965. Plant Anatomy, 2nd Edition. John Wiley & Sons. 767 pp.
• This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.