A petal is one member or part of the corolla of a flower. It is the inner part of the perianth that comprises the sterile parts of a flower and consists of inner and outer tepals. These tepals are usually differentiated into petals and sepals. 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 is indicative of the plant's classification: dicots having typically four or five petals and monocots having three, or some multiple of three, petals. Wildflowers A flower is the reproductive organ of those plants classified as angiosperms (flowering plants; Division Magnoliophyta). ... A magnolia flower showing the petal-like white tepals In a general sense, a tepal is any member or segment of the perianth of a flower, such as a petal or sepal, usually used when all are of similar shape and color (that is, undifferentiated). ... Flower of the Primrose Willowherb (Ludwigia octovalvis) showing petals and sepals A sepal is one member or part of the calyx of a flower. ... Orders see text Dicotyledons or dicots are flowering plants whose seed contains two embryonic leaves or cotyledons. ... Orders Base Monocots: Acorus Alismatales Asparagales Dioscoreales Liliales Pandanales Family Petrosaviaceae Commelinids: Arecales Commelinales Poales Zingiberales Family Dasypogonaceae Monocotyledons or monocots are a group of flowering plants usually ranked as a class and once called the Monocotyledoneae. ...

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

There exists considerable variation in form of petals among the flowering plants. 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. Download high resolution version (800x851, 151 KB)Image of a primrose willowherb Ludwigia octovalvis (Family Onagraceae), flower showing petals and sepals. ... Download high resolution version (800x851, 151 KB)Image of a primrose willowherb Ludwigia octovalvis (Family Onagraceae), flower showing petals and sepals. ... Genera Boisduvallia Calylophus Camissonia Chamerion Circaea Clarkia Epilobium Eucharidium Fuchsia Gaura Gayophytum Gongylocarpus Hauya Hemifuchsia Heterogaura Isnardia Jussiaea Lopezia Ludwigia Oenothera Stenosiphon Xylonagra Zauschneria The Onagraceae or Willowherb family (or Evening Primose family) is a family of flowering plants. ... Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also angiosperms or Magnoliophyta) are one of the major groups of modern plants, comprising those that produce seeds in specialized reproductive organs called flowers, where the ovulary or carpel is enclosed. ...

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. Genera See: List of Poaceae genera The true grasses are monocot (class Liliopsida) plants of the family Poaceae (formerly Graminae). ...

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. Orchid re-directs here; for alternate uses see Orchid (disambiguation) Genera Over 800 See List of Orchidaceae genera. ... Subfamilies Faboideae Caesalpinioideae Mimosoideae References GRIN-CA 2002-09-01 The Family Fabaceae (also as Family Leguminosae) is a grouping of plants in the Order Fabales, and one of the largest families of flowering plants with 650 genera and over 18,000 species. ...