Tetrameric flower of the Primrose Willowherb (Ludwigia octovalvis) showing petals and sepals

This tulip has dozens of petals. Tepals are elements of the Perianth, or outer part of a flower which include the Petals or Sepals The term tepal is usually used when all segments The Onagraceae, also known as the Willowherb family or Evening Primose family, is a family of Flowering plants The family includes about Tulipa, commonly called tulip, is a Genus of about 150 species of bulbous Flowering plants in the family Liliaceae.

A petal (from Ancient Greek petalon "leaf", "thin plate"), regarded as a highly modified leaf, is one member or part of the corolla of a flower. The Ancient Greek language is the historical stage in the development of the Hellenic language family spanning the Archaic (c A petal (from Ancient Greek petalon "leaf" "thin plate" regarded as a highly modified leaf is one member or part of the corolla A flower, also known as a bloom or Blossom, is the reproductive structure found in Flowering plants (plants of the division Magnoliophyta, also The corolla is the name for all of the petals of a flower; the inner perianth whorl, term used when this is not the same in appearance (color, shape) as the outermost whorl (the calyx) and is used to attract pollinators based on its bright color. The term perianth has two similar but separate meanings in botany In Flowering plants the perianth is the outer sterile whorls of a Flower (see A sepal (from Latin separatus "separate" + petalum "petal" is a part of the flower of Angiosperms or flower plants A pollinator is the biotic agent ( vector) that moves Pollen from the male Anthers of a Flower to the female stigma of a flower to accomplish Advertising colouration refers to semantic Colours seen in numerous organisms It is the inner part of the perianth that comprises the sterile parts of a flower and consists of inner and outer tepals. Tepals are elements of the Perianth, or outer part of a flower which include the Petals or Sepals The term tepal is usually used when all segments These tepals are usually differentiated into petals and sepals. A sepal (from Latin separatus "separate" + petalum "petal" is a part of the flower of Angiosperms or flower plants The term "tepal" is usually applied when the petals and sepals are similar in shape and color. In a "typical" flower the petals are showy and colored and surround the reproductive parts. The number of petals in a flower (see merosity) is indicative of the plant's classification: eudicots (the largest group of dicots) having typically four or five petals and monocots and magnoliids having three, or some multiple of three, petals. Tepals are elements of the Perianth, or outer part of a flower which include the Petals or Sepals The term tepal is usually used when all segments Eudicots and Eudicotyledons are terms introduced by Doyle & Hotton (1991 to refer to a group of Flowering plants that had been called "tricolpates" or "non-Magnoliid Dicotyledons, or "dicots", is a name for a group of Flowering plants whose Seed typically has two embryonic leaves or Cotyledons There Monocotyledons or monocots are one of two major groups of Flowering plants (angiosperms that are traditionally recognised the other being Dicotyledons ^[1]

There exists considerable variation in form of petals among the flowering plants. The flowering plants or angiosperms ( Angiospermae or Magnoliophyta) are the most widespread group The petals can be united towards the base, forming a floral tube. In some flowers, the entire perianth forms a cup (called a calyx tube) surrounding the gynoecium, with the sepals, petals, and stamens attached to the rim of the cup.

The flowers of some species lack or have very much reduced petals. These are often referred to as apetalous. Examples of flowers with much reduced perianths are found among the grasses. Poaceae or Gramineae is a family in the Class Liliopsida of the flowering plants.

The petals are usually the most conspicuous parts of a flower, and the petal whorl or corolla may be either radially or bilaterally symmetrical. If all of the petals are essentially identical in size and shape, the flower is said to be regular or actinomorphic (meaning 'ray-formed'). Many flowers are symmetrical in only one plane (i. e. , symmetry is bilateral) and are termed irregular or zygomorphic (meaning yoke- or pair-formed). In irregular flowers, other floral parts may be modified from the regular form, but the petals show the greatest deviation from radial symmetry. Examples of zygomorphic flowers may be seen in orchids and members of the pea family. Fabaceae or Leguminosae is a large and economically important family of Flowering plants which is commonly known as the legume family, pea The petal is the colorful, often showy part of a plant.

Other structures which may look like petals

Some plants have petaloid stamens, in plants like Canna that have true petals and staminodes, the stamen (staminodes) are modified to look like large showy petals. The stamen ( Plural stamina or stamens, from Latin stamen meaning "thread of the warp " is the male Canna (or Canna lily, although not a true Lily) is a Genus of approximately twenty Species of Flowering plants In Botany, a staminode is an often rudimentary sterile or abortive Stamen.

A number of plants have bracts that resemble petals for example in Bougainvillea and Cornus florida (flowering dogwood). In Botany, a bract is a modified or specialized Leaf. Bracts are ordinarily associated with reproductive structures (subtending Flowers Inflorescence Bougainvillea is a genus of Flowering plants native to South America from Brazil west to Peru and south to southern Argentina Cornus florida ( Flowering Dogwood, syn Benthamidia florida (L Petal-like bracts are common features in some plant families like Euphorbiaceae. The Spurge family ( Euphorbiaceae) is a large family of Flowering plants with 300 genera and around 7500 species

In many plants of the aster family such as the sunflower, Helianthus annuus, the circumference of the flower head is composed of ray florets. The family Asteraceae or Compositae (known as the aster, daisy, or sunflower family) is the largest family of Flowering The sunflower ( Helianthus annuus) is an Annual plant in the family Asteraceae and native to the Americas, with a large flowering Each ray floret is anatomically an individual flower with a single large petal.

Corolla

Corolla is the collective term for petals of a flower taken as a group within the calyx. A sepal (from Latin separatus "separate" + petalum "petal" is a part of the flower of Angiosperms or flower plants Normally the corolla is the most conspicuous part of a flower and of a bright colour other than green. The concept of corolla description is widely used in botany as a primary determinant of vascular plant identification. Botany, plant science(s, phytology, or plant biology is a branch of Biology and is the scientific study of plant Life Vascular plants (also known as tracheophytes or higher plants) are those Plants that have lignified tissues for conducting Alternatively the corolla may be considered as the inner whorl of the perianth structure. The term perianth has two similar but separate meanings in botany In Flowering plants the perianth is the outer sterile whorls of a Flower (see The role of the corolla in plant evolution has been studied extensively since Darwin postulated a theory of the origin of elongated corollae. eVolution is the third Album by eLDee, it was due to be released in 2008 Charles Robert Darwin (February 12 1809 &ndash April 19 1882 was an English naturalist, who realised and demonstrated that all Species of life ^[2]

References

1. ^ Pamela S. Soltis and Douglas E. Soltis (2004). "The origin and diversification of angiosperms". American Journal of Botany 91: 1614-1626.  
2. ^ Analysis of theory of evolution of corolla elongation involving pollinating species