Mindblown: a blog about philosophy.
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Paraphyletic group
(In phylogenetics) a group of organisms that contains the most recent common ancestor shared with the group under study but not all of its descendants.
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Parapatric
(Of distribution) with ranges that do not overlap but are adjacent.
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Parallelodromous
(Of venation) with two or more large veins originating at the leaf base and running parallel to each other throughout most of the leaf length, converging near the apex.
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Parallel evolution
The evolution of a similar feature in two or more groups, not necessarily guided by similar life-styles or habitats.
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Parallel
(Of veins) all running in the same direction at fairly close intervals. Several to many veins of about the same size (the midrib sometimes more conspicuous) and parallel to one another, as in many monocots. Side by side, approximately the same distance apart for the entire length; often used in reference to veins or edges…
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Paracladia
Subsidiary branches that follow the pattern of main branches; Units of repeated branching patterns.
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Parabolic
(Of leaf ) ovate-oblong or ovate, obtuse and contracting below the apex [rarely used term].
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Papyraceous
Papery; with the thickness or consistency of paper. Of the texture of writing paper. Parchment-like; in obstetrics, denoting a fetus that is retained in the uterus beyond natural term and appears mummified.
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Papulose
With pimples or small pustules.
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Pappus
A series of bristles, hairs or scales round the base of the corolla and later around the apex of the fruit (as in Compositae/Asteraceae). Calyx modified into hairs. An appendage (a modified calyx) at the apex of a seed in the aster family, consisting of awns, bristles, or scales. Thistle-down. In Compositae this, with chaff,…
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