Difference between revisions of "Asplenium septentrionale"
Deutschl. Fl. 2: 12. 1796.
Common names: Forked spleenwort
Basionym: Acrostichum septentrionale Linnaeus Sp. Pl. 2: 1068. 1753
Treatment appears in FNA Volume 2.
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|common_names=Forked spleenwort | |common_names=Forked spleenwort | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Acrostichum septentrionale | |name=Acrostichum septentrionale | ||
|authority=Linnaeus | |authority=Linnaeus | ||
| + | |rank=species | ||
| + | |publication_title=Sp. Pl. | ||
| + | |publication_place=2: 1068. 1753 | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>not proliferous. <b>Stems</b> erect, much branched to produce dense many-stemmed tufts or mats bearing numerous crowded leaves; scales dark reddish brown to black throughout, narrowly deltate, 2–4 × 0.3–0.6 mm, margins entire. <b>Leaves</b> monomorphic. <b>Petiole</b> dark reddish brown proximally, fading to green distally, 2–13 cm, 2–5 times length of blade; indument absent. <b>Blade</b> linear, simple or more often 1-pinnate, 0.5–4 × 0.1–0.4 cm, occasionally wider when pinnae strongly diverge, leathery, glabrous; base acute; apex acute, not rooting at tip. <b>Rachis</b> green, lustrous, glabrous. <b>Pinnae</b> of pinnate leaves 2(–4), strongly ascending to give forked appearance, linear, (5–)10–30 × 0.75–3 mm; base acute; margins remotely lacerate; apex acute. <b>Veins</b> free, obscure. <b>Sori</b> usually 2+ per pinna, parallel to margins. <b>Spores</b> 64 per sporangium. <b>2n</b> = 144.</span><!-- |
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|elevation=700–2900 m | |elevation=700–2900 m | ||
|distribution=Ariz.;Calif.;Colo.;D.C.;N.Mex.;Okla.;Oreg.;S.Dak.;Tex.;Utah;W.Va.;Wyo.;Mexico in Baja California;Europe;Asia. | |distribution=Ariz.;Calif.;Colo.;D.C.;N.Mex.;Okla.;Oreg.;S.Dak.;Tex.;Utah;W.Va.;Wyo.;Mexico in Baja California;Europe;Asia. | ||
| − | |discussion=<p>In North America Asplenium septentrionale is principally a western species with isolated disjunct populations in Monroe and Hardy counties, West Virginia. Because of its close resemblance to a tuft of grass, it is easily overlooked, and discoveries of additional localities are to be expected. In Europe A. septentrionale is known to hybridize with several species, but in North America only the hybrid with A. trichomanes (A. × alternifolium Wulfen) is known.</p> | + | |discussion=<p>In North America <i>Asplenium septentrionale</i> is principally a western species with isolated disjunct populations in Monroe and Hardy counties, West Virginia. Because of its close resemblance to a tuft of grass, it is easily overlooked, and discoveries of additional localities are to be expected. In Europe <i>A. septentrionale</i> is known to hybridize with several species, but in North America only the hybrid with <i>A. trichomanes</i> (A. × alternifolium Wulfen) is known.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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name=Asplenium septentrionale | name=Asplenium septentrionale | ||
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|authority=(Linnaeus) Hoffmann | |authority=(Linnaeus) Hoffmann | ||
|rank=species | |rank=species | ||
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|publication year=1796 | |publication year=1796 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_229.xml |
|genus=Asplenium | |genus=Asplenium | ||
|species=Asplenium septentrionale | |species=Asplenium septentrionale | ||
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Latest revision as of 20:22, 5 November 2020
Roots not proliferous. Stems erect, much branched to produce dense many-stemmed tufts or mats bearing numerous crowded leaves; scales dark reddish brown to black throughout, narrowly deltate, 2–4 × 0.3–0.6 mm, margins entire. Leaves monomorphic. Petiole dark reddish brown proximally, fading to green distally, 2–13 cm, 2–5 times length of blade; indument absent. Blade linear, simple or more often 1-pinnate, 0.5–4 × 0.1–0.4 cm, occasionally wider when pinnae strongly diverge, leathery, glabrous; base acute; apex acute, not rooting at tip. Rachis green, lustrous, glabrous. Pinnae of pinnate leaves 2(–4), strongly ascending to give forked appearance, linear, (5–)10–30 × 0.75–3 mm; base acute; margins remotely lacerate; apex acute. Veins free, obscure. Sori usually 2+ per pinna, parallel to margins. Spores 64 per sporangium. 2n = 144.
Habitat: Cliffs of various substrates
Elevation: 700–2900 m
Distribution
Ariz., Calif., Colo., D.C., N.Mex., Okla., Oreg., S.Dak., Tex., Utah, W.Va., Wyo., Mexico in Baja California, Europe, Asia.
Discussion
In North America Asplenium septentrionale is principally a western species with isolated disjunct populations in Monroe and Hardy counties, West Virginia. Because of its close resemblance to a tuft of grass, it is easily overlooked, and discoveries of additional localities are to be expected. In Europe A. septentrionale is known to hybridize with several species, but in North America only the hybrid with A. trichomanes (A. × alternifolium Wulfen) is known.
Selected References
None.
Lower Taxa
None.