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A sepal (/ ˈ s ɛ p əl, ˈ s iː p əl /) [1] [2] [3] is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom.
A diagram showing some kinds of petal or sepal aestivation in flower buds. A: quincuncial; B: twisted, C: cochleate; D: contorted; E: valvate; F: open. Aestivation or estivation is the positional arrangement of the parts of a flower within a flower bud before it has opened.
Diagram showing the parts of a mature flower. In this example the perianth is separated into a calyx (sepals) and corolla (petals) A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals.
The middle, upright sepal is pinkish on the inside with scarlet veins. [1] The petals, which are very much smaller than the sepals, are erect colored yellow with red spots at their tops, but pale scarlet at their bases. [1] It blooms during the summer months, particularly in January, but continuing into March. [1] [3] [2] [4]
[14] Compare derived terms such as monadelphous, having stamens growing in a single bunch or tube, for example in Hibiscus, and diadelphous, growing in two bunches. adherent Slightly united to an organ of another kind, [13] usually to a part of another whorl, e.g. a sepal connected to a petal. Contrast adnate. adnate
A fruit is the mature, ripened ovary of a flower following double fertilization in an angiosperm.Because gymnosperms do not have an ovary but reproduce through fertilization of unprotected ovules, they produce naked seeds that do not have a surrounding fruit, this meaning that juniper and yew "berries" are not fruits, but modified cones.
A synsepal is a floral structure formed by the partial or complete fusion of two or more sepals. [1] Such sepals are said to be synsepalous or gamosepalous. [2]It is common among lady's slipper orchids (Cypripedioideae) that the two lateral sepals are connate to form a synsepal in the outer whorl.
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs.