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Ctenitis ampla (Humb. & Bonpl. ex Willd.) Ching  
Family: Dryopteridaceae
[Aspidium amplum (Humb. & Bonpl. ex Willd.) Mett., moreAspidium catocarpum Kunze, Aspidium culcita Christ, Aspidium furcatum Kl., Aspidium nemophilum Kunze, Ctenitis catocarpa (Kunze) Morton, Ctenitis nemophila (Kunze) Ching, Ctenitis sloanei (Poepp. ex Spreng.) C. V. Morton, Dryopteris ampla (Humb. & Bonpl. ex Willd.) O. Kuntze, Dryopteris catocarpa (Kunze) O. Kuntze, Dryopteris culcita (Christ) C. Chr., Dryopteris furcata (Kl.) O. Kuntze, Dryopteris nemophila (Kunze) C. Chr., Dryopteris palangatana (Hook.) Ching, Filix ampla (Humb. & Bonpl. ex Willd.) Farw., Lastrea ampla (Humb. & Bonpl. ex Willd.) Moore, Lastrea furcata (Kl.) Moore, Lastrea nemophila (Kunze) Moore, Nephrodium amplum (Humb. & Bonpl. ex Willd.) Bak., Nephrodium catocarpum (Kunze) Hook., Nephrodium furcatum (Kl.) Hook., Nephrodium palangatanum Hook., Nephrodium paleaceum (Hook. fil.) Diels, Phegopteris ampla (Humb. & Bonpl. ex Willd.) Fée, Phegopteris sloanei (Poepp. ex Spreng.) Fée, Polypodium amplum Humb. & Bonpl. ex Willd., Polypodium paleaceum Hook. fil., Polypodium sloanei Poepp. ex Spreng.]
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Robbin C. Moran in Flora of North America (vol. 2)
Petiole scales orangish, rarely brown, linear or filiform, 20--40 × 0.4--1.5 mm, densely tangled and woollike. Blade 2--4-pinnate-pinnatifid, glabrous or glandular on both surfaces; glands pale yellow, ca. 0.1 mm, appressed. Basal pinnae 22--50 × 10--23 cm, inequilateral, elongate basiscopically. Ultimate segments 2--4 mm wide; margins ciliate. Veins 3--6 pairs per segment, unbranched or 1-forked. Sori medial to inframedial; indusia present but soon deciduous and therefore appearing absent. 2 n = 82. Wooded limestone ledges, hammocks, cypress swamps; 0 m; Fla.; s Mexico; West Indies in Antilles, Trinidad; Central America; South America in Colombia, Ecuador, Peru, and Venezuela. The names Ctenitis ampla (Humboldt & Bonpland ex Willdenow) Ching and Dryopteris ampla (Humboldt & Bonpland ex Willdenow) Kuntze have been misapplied to this taxon. Ctenitis sloanei and C . submarginalis both have numerous scales at the base of the petiole; in C . sloanei , however, the scales form a large, conspicuous, tangled tuft.

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The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.