Some plants retain a thorny calyx, either dried or live, as protection for the fruit or seeds. Since they include Lilialesan alternative name is lilioid monocots.
Examples of plants in which the term tepal is appropriate include genera such as Aloe and Tulipa. In some flowers, the sepals are fused towards the base, forming a calyx tube as in the Lythraceae family,  and Fabaceae.
Examples of flowers with much reduced perianths are found among the grasses. Examples include species of Acaenasome of the Solanaceae for example the TomatilloPhysalis philadelphicaand the water caltropTrapa natans.
When the undifferentiated tepals resemble petals, they are referred to as "petaloid", as in petaloid monocotsorders of monocots with brightly coloured tepals.
In this example the perianth is separated into a calyx sepals and corolla petals Tetramerous flower of Ludwigia octovalvis showing petals and sepals. In contrast, genera such as Rosa and Phaseolus have well-distinguished sepals and petals.
After blooming, the sepals of Hibiscus sabdariffa expand into an edible accessory fruit In many Fabaceae flowers, a calyx tube surrounds the petals. The merosity of a eudicot flower is typically four or five. The merosity of a monocot or palaeodicot flower is three, or a multiple of three.
Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom. Diagram showing the parts of a mature flower.
Morphologicallyboth sepals and petals are modified leaves. Most often such structures protrude until the fruit is mature and falls off. The word calyx was adopted from the Latin calyx,  not to be confused with calix, a cup or goblet.
This is an effective protection against some kinds of birds and insects, for example in Hibiscus trionum and the Cape gooseberry. In some species the calyx not only persists after flowering, but instead of withering, begins to grow until it forms a bladder-like enclosure around the fruit.
The calyx the sepals and the corolla the petals are the outer sterile whorls of the flower, which together form what is known as the perianth.
In Carlyx corolla flowers e. The development and form of the sepals vary considerably among flowering plants.Calyx, a glasshouse and exhibition centre in the Royal Botanic Garden, Sydney; Calyx Institute, founded by Nicholas Merrill. A non-profit education and research organization for free speech, free expression, civic engagement and privacy rights.
See also. Calix (disambiguation)Founded: A and Example Case Writeup for Calyx and Corolla Maria Jose Alvarez 1. Compare structure of the value-added chain in Calyx & Corolla’s approach to flower. The calyx (the sepals) and the corolla (the petals) are the outer sterile whorls of the flower, which together form what is known as the perianth.
 The term tepal is usually applied when the parts of the perianth are difficult to distinguish,  e.g. the petals and sepals share the same color, or the petals are absent and the sepals are.
Calyx & Corolla, Inc., doing business as Calyx Flowers, Inc., offers flowers, plants, bouquets, and gifts in the United States. The company provides its products for Location: Shelburne Road Shelburne, VT United States.
chlamys, floral envelope, perianth, perigone, perigonium - collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils pappus - calyx composed of scales or bristles or featherlike hairs in plants of the Compositae such as thistles and dandelions.
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