Epithets
| erica- | prefix referring to Heath and Heather family |
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| erio- | prefix meaning "wooly" |
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| erythro- | prefix meaning "red" |
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| esculenta | edible |
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| esculentus | edible |
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| exaltatum | very tall |
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| exaltatus | very tall |
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| excisa | cut away |
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| falcatus | sickle-shaped |
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| farinaceus | mealy |
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| farinosus | mealy |
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| fastigiata | narrowly erect |
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| fastigiatus | narrowly erect |
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| fenestrellata | with little windows |
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| ferruginea | rust colored |
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| filamentosa | many filaments |
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| filamentosum | many filaments |
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| fili- | prefix meaning "thread" |
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| filic- | prefix or referring to "fern" |
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| filix- | prefix or referring to "fern" |
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| fimbriata | fringed |
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| fimbriatus | fringed |
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| firma | strong |
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| firmus | strong |
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| fistulosa | tubular |