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In botany, a whorl or verticil is a whorled arrangement of leaves, sepals, petals, stamens, or carpels that radiate from a single point and surround or wrap around the stem or stalk. [ 1 ] [ 2 ] A leaf whorl consists of at least three elements; a pair of opposite leaves is not called a whorl.
A whorl can occur as a basal structure where all the leaves are attached at the base of the shoot and the internodes are small or nonexistent. A basal whorl with a large number of leaves spread out in a circle is called a rosette .
The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation of 360°. Each spire whorl represents a rotation of 360°. A spire is part of the shell of a snail , a gastropod mollusc , a gastropod shell , and also the whorls of the shell in ammonites , which are fossil shelled cephalopods .
A whorl (/ w ɜːr l / or / w ɔːr l /) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs).
Nuclear whorl(s)—small, generally smooth whorls formed within the egg, and constituting the apex of the shell; Protoconch—a larval shell of a mollusc; also refers to protoconch whorls of an adult shell; Teleoconch—all the whorls of a shell after the protoconch whorls; Nepionic whorls : the whorls immediately following the embryonic whorls.
Apex: the smallest few whorls of the shell; Body whorl (or last whorl): the largest whorl in which the main part of the visceral mass of the mollusk is found; Columella: the "little column" at the axis of revolution of the shell; Operculum: the "trapdoor" of the shell; Parietal callus: a ridge on the inner lip of the aperture in certain gastropods
Mattel is being sued for mistakenly printing the URL for a pornographic site on the packaging for special-edition “Wicked” dolls. According to court documents, a South Carolina resident is ...
An epicalyx, which forms an additional whorl around the calyx of a single flower, is a modification of bracteoles [7] In other words, the epicalyx is a group of bracts resembling a calyx or bracteoles forming a whorl outer to the calyx. [8] It is a calyx-like extra whorl of floral appendages.