Mindblown: a blog about philosophy.
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Periclinal
Parallel to another structure (mainly used in cell division).
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Pericarp
The wall of the ripened ovary, divisible into epicarp, mesocarp and endocarp when a distinction between the three can be made; Fruit wall, sometimes includes the seed (e.g. Linnaeus’ use of ‘pericarpium’); The fleshy layer (united ectocarp and mesocarp) surrounding the stony endocarp in Commiphora. The plant material surrounding the seed of fruits. The wall…
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Perianth tube
The lower united part of the perianth.
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Perianth segment
One of the parts of the two floral whorls, calyx and corolla, used especially when these two whorls are quite similar.
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Perianth
Collective term for the calyx and corolla. The outer floral whorl or whorls of a monocotyledonous flower. The floral structure consisting of the calyx and corolla. This term is used mostly when the calyx and corolla are either identical in physical appearance or not readily distinguishable from each other. The floral envelops including both calyx…
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Pergamaceous, pergamentaceous
(Of endocarp) like parchment or thick paper.
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Perforate
(Of pollen exine) punctured by numerous holes. Pierced with holes, or having transparent dots giving that appearance. To make a hole through something. To pierce or otherwise make a hole. To puncture or to make holes.
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Perfoliate
When the stem passes through the blade of a leaf or through a basally connate pair of leaves. Of a leaf, perforated by the stem. The condition of a sessile leaf when the base completely encircles the stem. Passing through a leaf, or appearing so. A leaf (or a pair of conjoined opposite leaves) forming…
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Perfect
(Of flowers) with both male and female parts. Having functional stamens and pistil(s) in the same flower. Of a flower, one that has a full complement of male and female parts as well as a floral envelope (peta ls and sepals). A flower with both stamens and carpels, without regard to the state of the…
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Perennial
Living for several to many years, as opposed to annual or biennial. (Sometimes restricted to nonwoody plants). A plant that lives for three years or more. In botany, the term includes trees and shrubs, while in horticulture it is normally limited to plants that do not produce permanent woody stems, such as irises, peonies or…
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