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The term perianth is derived from Greek περί (peri, "around") and άνθος (anthos, "flower"), while perigonium is derived from περί (peri) and γόνος (gonos, "seed, sex organs"). In the mosses and liverworts ( Marchantiophyta ), the perianth is the sterile tubelike tissue that surrounds the female reproductive structure (or ...
The perianth consists of 1-5 white, membranaceous tepals (missing in some Corispermum species) without vascular bundles, not persistent. The pollen grains of Agriophyllum and Corispermum are of the "Chenopodium type", of Anthochlamys of the "Anthochlamys type". The fruits possess supporting tissue consisting of macrosclereids.
1. In flowering plants, a ring of structures that may be united in a tube, arising from the corolla or perianth of a flower and standing between the perianth lobes and the stamen s. The trumpet of a daffodil is a corona. 2. In grasses, a hardened ring of tissue surmounting the lemma in some species. cortex. pl. cortexes or cortices
Irregularities in floral symmetry in these cases involve the perianth and androcecium. The perianth almost always has a distinct calyx and corolla. However, the corolla may be absent, in which case the perianth is said to be sepaline, as occurs in dozens of cesalpinioid genera. The calyx has 5 sepals (rarely 3 or 6) arranged in a single cycle ...
These are fused at the base to form one large, showy, six-parted structure (the perianth). In lilies the organs in the first whorl are separate from the second, but all look similar, thus all the showy parts are often called tepals. Where sepals and petals can in principle be distinguished, usage of the term "tepal" is not always consistent ...
The perianth is reduced to two scales, called lodicules, [1]: 11 that expand and contract to spread the lemma and palea; these are generally interpreted to be modified sepals. The flowers are usually hermaphroditic — maize being an important exception — and mainly anemophilous or wind-pollinated, although insects occasionally play a role. [2]
The flowers are usually bisexual (the lateral flowers may be unisexual). The 2-5-lobed perianth consists of two to five connate tepals. There are one or two stamens and an ovary with mostly two stigmas. In fruiting phase, the perianth remains membranous or becomes spongy, crustaceous, or horny. The fruit wall (pericarp) may be membranous ...
Coconuts take about twelve months to mature. Damage from the initial infestation under the perianth becomes apparent as the fruit develops and more of its surface becomes visible. The nut develops corky brown, fissured patches of damaged tissue and becomes distorted if the damage is on one side of the fruit and not the other.