Category: C
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Cleft
Divided almost to the middle; often used for split or lobed in a less specific way. With sharp lobes, usually near the middle. Indented about halfway to the midrib or base of the blade. Cut about halfway (as in a leaf). A small opening or hollow place in a surface or body part. Division, fissure,…
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Clay
Very fine particles of mineral rock, smaller than both sand and silt. A major component of soils, consisting of very fine particles of mineral origin that swell and become sticky when they take up water. A high proportion of clay in a soil makes it difficult to dig and impedes both root penetration and drainage.…
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Clawed
With a very narrow part near the base, but more distally with an expanded blade.
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Claw
The narrow proximal part of a flat organ (e.g. of a petal). A long narrow stalk-like base of a petal or sepal. The narrow, stalk-like base of some petals. The narrow, stem-like proximal part of a petal. Lower, narrower part of an organ, such as a petal – effectively the peta l stalk (cf. limb).…
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Clavuncle, clavuncula
In Apocynaceae, an enlarged stigma of which the sides and lower surface are the receptive zone; usually coherent with anthers.
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Clavi
(‘In clavi’) [name published] in the key.
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Clavellate
Diminutive of clavate: like a minute club, thickened at the end.
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Clavate
Club-shaped; thickened towards the end. Club-shaped; narrower below than above.
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Clathrate
Pierced with holes, like a lattice (usually used for fern scales).
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Classification
Ordering of taxa in specialised categories (such as species or family) based on perceived relationships. The process of ordering a collection of objects into a set of mutually exclusive and exhaustive classes. The ability to construct such an ordering mentality, and then, to reason about the quantitative relation between classes and their subclasses, first develops…