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Dicranopteris flexuosa (Schrad.) Underw.   (redirected from: Gleichenia flexuosa (Schrad.) Mett.)
Family: Gleicheniaceae
[Dicranopteris pumila (Mart.) Nakai, moreDicranopteris rigida (Kunze) Nakai, Dicranopteris scalpturata (Fée) Nakai, Gleichenia flexuosa (Schrad.) Mett., Gleichenia rigida (Kunze) J. Bommer & H. Christ, Mertensia flexuosa Schrad., Mertensia pumila Mart., Mertensia rigida Kunze, Mertensia scalpturata Fée]
Dicranopteris flexuosa image
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Clifton E. Nauman in Flora of North America (vol. 2)
Stems 2--5 mm diam.; hairs reddish brown to chestnut brown, falling off early. Leaves to more than 1 m, axes straw-colored, glabrous except at petiole base. Penultimate segments sessile, divergent to ascending, in ± equal pairs, deeply pinnatisect, lanceolate to oblanceolate, to 30 × 6 cm wide, leathery, glabrous, whitish waxy or glaucous abaxially. Ultimate segments linear, slightly dilated proximally, margins strongly revolute, apex retuse. Sori nearer midrib than margin; sporangia usually 6--12 per sorus. Terrestrial and climbing on open slopes in drainage ditches; widespread, tropical; 0 m; Ala., Fla.; Mexico; Central America; South America. Plants in Florida tend to be depauperate when compared to tropical populations; individual leaves are smaller and plants seldom form dense thickets. Dicranopteris flexuosa appears to be a natural element in the flora (J. R. Burkhalter 1985; R. Moyroud and C. E. Nauman 1989). Plants may not persist very long, however, as evidenced by Alabama and some Florida populations that are no longer extant.

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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.