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Achene, Cypsela |
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| One
of
several
categories
of
firm,
dry, one-seeded fruits
that
do
not
split at
maturity.
Technically, the fruit of a species in the composite family (Asteraceae) is called a "cypsela". The distinction between a cypsela and an achene is minor. Many authors still refer to composite fruits as achenes. Achenes and cypselae come in many sizes and shapes. Those shown below are but a few that serve to illustrate the concept. |
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| Figure A. Achenes of curly dock. (Rumex crispus) |
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| Figure
B. Cypselae
of
the
common
sunflower. (Helianthus annuus) |
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| Figure
C. Cypselae
of
sharp-leaved
goldenrod. (Solidago arguta) |
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| Images and text copyright Arieh Tal, 2017-2022. All rights reserved. |
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