Difference between revisions of "Nephrolepis exaltata"
Gen. Fil. plate 3. 1834.
Common names: Sword fern wild Boston fern
Basionym: Polypodium exaltatum Linnaeus
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Stem </b>scales spreading, concolored. <b>Tubers</b> absent. <b>Leaves</b> 4–15 × 0.5–1.2 dm. <b>Petiole</b> 0.2–4 dm, sparsely to moderately scaly; scales spreading, pale brown to reddish brown, concolored. <b>Blade</b> glabrous, sparsely to moderately scaly abaxially near costae and adaxially. <b>Rachis</b> 2.4–16.3 dm, points of pinna attachment 7.3–21 mm apart; scales moderately spaced, pale to dark brown, essentially concolored or margin indistinctly paler; hairs absent. <b>Central</b> pinnae deltate-oblong, slightly to distinctly falcate, 2.3–7.4 × 0.6–1.8 cm, base truncate to truncate-auriculate or auriculate, occasionally overlapping rachis, acroscopic lobe deltate to acute, margins serrulate, apex acute to deltate; costae adaxially glabrous. <b>Indusia</b> reniform to horseshoe-shaped, attached at narrow or broad sinus, 1–1.7 mm wide.</span><!-- |
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|genus=Nephrolepis | |genus=Nephrolepis | ||
|species=Nephrolepis exaltata | |species=Nephrolepis exaltata | ||
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Revision as of 14:24, 27 July 2019
Stem scales spreading, concolored. Tubers absent. Leaves 4–15 × 0.5–1.2 dm. Petiole 0.2–4 dm, sparsely to moderately scaly; scales spreading, pale brown to reddish brown, concolored. Blade glabrous, sparsely to moderately scaly abaxially near costae and adaxially. Rachis 2.4–16.3 dm, points of pinna attachment 7.3–21 mm apart; scales moderately spaced, pale to dark brown, essentially concolored or margin indistinctly paler; hairs absent. Central pinnae deltate-oblong, slightly to distinctly falcate, 2.3–7.4 × 0.6–1.8 cm, base truncate to truncate-auriculate or auriculate, occasionally overlapping rachis, acroscopic lobe deltate to acute, margins serrulate, apex acute to deltate; costae adaxially glabrous. Indusia reniform to horseshoe-shaped, attached at narrow or broad sinus, 1–1.7 mm wide.
Habitat: Terrestrial or epiphytic in forested to open habitats, most often as an epiphyte
Elevation: 0 m
Distribution
Fla., West Indies, Pacific Islands in scattered locations.
Discussion
Nephrolepis exaltata is occasionally found farther north in the flora, but only as an escape from cultivation. Nephrolepis exaltata is usually confused with N. cordifolia when sterile; the latter species can be distinguished by its distinctly bicolored, adaxial rachis scales. These bicolored scales will distinguish N. cordifolia from all of the other species, even in the absence of other key features.
Selected References
None.
Lower Taxa
None.