Epithets
| 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" |
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| crenata | notched |
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| crenatum | notched |
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| crenatus | notched |
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| crenulatum | crenate, with small rounded teeth |
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| crenulatus | crenate, with small rounded teeth |