Epithets
| coccifera | berry bearing |
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| coccinea | scarlet |
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| coccineum | scarlet |
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| cochlear | spoon shaped |
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| coelestina | sky blue |
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| coelestis | sky blue |
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| coerulea | deep blue |
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| coeruleus | deep blue |
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| collina | on hills |
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| collinus | on hills |
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| comans | covered with hair |
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| comatus | covered with hair |
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| communis | common |
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| commutatum | changeable |
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| commutatus | changeable |
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| comosa | covered with hair |
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| concolor | one color |
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| concoloris | one color |
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| connatus | fused together |
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| cord- | prefix meaning "heart" |
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| cordata | heart-shaped |
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| cordatus | heart-shaped |
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| coriacea | leathery |
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| coriaceus | leathery |
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| crass- | prefix meaning "thick" |