| angiopteris | (noun) highly variable species of very large primitive ferns of the Pacific tropical areas with high rainfall | Synonyms: Angiopteris evecta, giant fern |
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| ephemeris | (noun) an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year | - |
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| lecanopteris | (noun) any of several bizarre ferns of the genus Lecanopteris having swollen hollow rhizomes that provide homes for symbiotic ants | - |
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| pecopteris | (noun) Carboniferous fossil fern characterized by a regular arrangement of the leaflets resembling a comb | - |
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| thyrsopteris | (noun) a terrestrial tree fern of South America | Synonyms: Thyrsopteris elegans |
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