| General Information |
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| Distribution | Hawaiian Islands.
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Habit
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Terrestrial, epipetric in S. squarrosa. Rhizomes erect, subarborescent, non-stoloniferous, stout, bearing brown, linear-acuminate or lanceolate scales, these entire or minutely toothed or ciliolate at the margins.
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Leaves
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Fronds monomorphic; stipe stout, long, stramineous or darkened, with filiform brown scales proximally, glabrous or
glabrescent distally; blade concolorous, lanceolate to elliptic, pinnate-pinnatifid or bipinnate, apex pinnatifid; rachis scaly, sometimes with glandular hairs, glabrous or glabrescent; buds absent; aerophores absent; pinnae sessile or short-stipitate, with segments falcate to obtuse, subentire to crenate; veins furcate near the costa, uniting to form a pericostal arch, ending in hydathodes.
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Sori
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Sori linear, continuous over vein arches, indusia continuous or not, sometimes
glandular.
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Spores
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x = 33.
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Notes
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Name honors Dr. Joseph Sadler (1791-1849), a physician who studied the ferns of his native Hungary.
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Contributor
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Nancy Khan
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