Difference between revisions of "Nephrolepis ×averyi"
Amer. Fern J. 69: 69. 1979.
Common names: Avery's sword fern
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 loosely appressed to spreading, essentially concolored. <b>Tubers</b> absent. <b>Leaves</b> 8–30 × 0.5–1.3 dm. <b>Petiole</b> 1.2–5 dm, moderately to densely scaly; scales spreading, reddish to light brown throughout. <b>Blade</b> moderately scaly, glabrous to occasionally pubescent abaxially, glabrous adaxially, hairs pale to light brown, 0.2–0.7 mm. <b>Rachis</b> 5–26 dm, points of pinna attachment 9–25 mm apart; scales scattered, brown throughout. <b>Central</b> pinnae narrowly deltate to oblong-deltate, 3.6–9 × 0.7–2 cm, base truncate, sometimes rounded basiscopically, barely auriculate acroscopically, acroscopic lobe obtuse to acute, margins serrulate, apex narrowly acute to attenuate, falcate to slightly so; costae adaxially sparsely pubescent, hairs pale, erect, 0.1–0.5 mm. <b>Indusia</b> horseshoe-shaped to circular, attached at narrow sinus or peltate, 0.9–1.1 mm wide. <b>2n</b> = 164.</span><!-- |
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|elevation=0 m | |elevation=0 m | ||
|distribution=Fla.;Mexico;West Indies. | |distribution=Fla.;Mexico;West Indies. | ||
| − | |discussion=<p>Nephrolepis × averyi is an allotetraploid derived from hybridization between N. biserrata and N. exaltata and is known to occur only in mixed populations of both parent species. It is distinguished from N. exaltata by its sparsely hairy adaxial costae, larger size, and misshapen spores, and from N. biserrata by its falcate pinnae and narrower leaves.</p> | + | |discussion=<p><i>Nephrolepis</i> × <i>averyi</i> is an allotetraploid derived from hybridization between <i>N. biserrata</i> and <i>N. exaltata</i> and is known to occur only in mixed populations of both parent species. It is distinguished from <i>N. exaltata</i> by its sparsely hairy adaxial costae, larger size, and misshapen spores, and from <i>N. biserrata</i> by its falcate pinnae and narrower leaves.</p> |
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name=Nephrolepis ×averyi | name=Nephrolepis ×averyi | ||
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|authority=Nauman | |authority=Nauman | ||
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|publication year=1979 | |publication year=1979 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_126.xml |
|genus=Nephrolepis | |genus=Nephrolepis | ||
|species=Nephrolepis ×averyi | |species=Nephrolepis ×averyi | ||
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Latest revision as of 21:21, 5 November 2020
Stem scales loosely appressed to spreading, essentially concolored. Tubers absent. Leaves 8–30 × 0.5–1.3 dm. Petiole 1.2–5 dm, moderately to densely scaly; scales spreading, reddish to light brown throughout. Blade moderately scaly, glabrous to occasionally pubescent abaxially, glabrous adaxially, hairs pale to light brown, 0.2–0.7 mm. Rachis 5–26 dm, points of pinna attachment 9–25 mm apart; scales scattered, brown throughout. Central pinnae narrowly deltate to oblong-deltate, 3.6–9 × 0.7–2 cm, base truncate, sometimes rounded basiscopically, barely auriculate acroscopically, acroscopic lobe obtuse to acute, margins serrulate, apex narrowly acute to attenuate, falcate to slightly so; costae adaxially sparsely pubescent, hairs pale, erect, 0.1–0.5 mm. Indusia horseshoe-shaped to circular, attached at narrow sinus or peltate, 0.9–1.1 mm wide. 2n = 164.
Habitat: Terrestrial or epiphytic in forested, often moist habitats, e.g., swamps, hammocks, or relatively open, disturbed habitats
Elevation: 0 m
Distribution
Fla., Mexico, West Indies.
Discussion
Nephrolepis × averyi is an allotetraploid derived from hybridization between N. biserrata and N. exaltata and is known to occur only in mixed populations of both parent species. It is distinguished from N. exaltata by its sparsely hairy adaxial costae, larger size, and misshapen spores, and from N. biserrata by its falcate pinnae and narrower leaves.
Selected References
None.
Lower Taxa
None.