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− | --><span class="statement" id="st-d0_s0" data-properties="root reproduction"><b>Roots </b>proliferous.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem architecture"><b>Stems </b>erect, not branched;</span> <span class="statement" id="st-d0_s2" data-properties="scale coloration;scale shape;scale count or density;scale length;scale width;margin architecture or shape">scales blackish throughout, linear-deltate, sparse, 1–1.3 × 0.1–2.4 mm, margins entire.</span> <span class="statement" id="st-d0_s3" data-properties="leaf architecture"><b>Leaves </b>nearly monomorphic.</span> <span class="statement" id="st-d0_s4" data-properties="petiole coloration;petiole coloration;petiole atypical some measurement;petiole some measurement;petiole length;leaf life cycle"><b>Petiole </b>green, becoming blackish in older leaves, 1–5 (–12) cm, 1/8–1/3 length of blade;</span> <span class="statement" id="st-d0_s5" data-properties="scale coloration;scale shape">indument of black, narrowly lanceolate scales.</span> <span class="statement" id="st-d0_s6" data-properties="blade reflectance;blade arrangement or course or shape;blade architecture or shape;blade atypical length;blade length;blade width;blade texture;blade pubescence"><b>Blade </b>dull, linear, 2-pinnate, (4–) 12–22 × 1–3.5 cm, papery, glabrous;</span> <span class="statement" id="st-d0_s7" data-properties="base shape">base slightly tapered;</span> <span class="statement" id="st-d0_s8" data-properties="apex width;apex architecture">apex narrowing gradually, not rooting.</span> <span class="statement" id="st-d0_s9" data-properties="rachis coloration;rachis coloration;rachis reflectance;rachis architecture or pubescence;leaf life cycle"><b>Rachis </b>mostly blackish, green distally and in juvenile leaves, shiny, sparsely scaly.</span> <span class="statement" id="st-d0_s10" data-properties="pinna shape;pinna length;pinna width;pair count"><b>Pinnae </b>in 9–20 pairs, oblong, 0.5–2 × 0.4–1.3 cm;</span> <span class="statement" id="st-d0_s11" data-properties="apex shape;apex shape;apex shape">apex blunt to truncate.</span> <span class="statement" id="st-d0_s12" data-properties="segment count"><b>Pinnules </b>of 1–2 segments;</span> <span class="statement" id="st-d0_s13" data-properties="segment shape;segment length;segment width">segments linear-oblong, 3–6 × 1–3 mm;</span> <span class="statement" id="st-d0_s14" data-properties="margin architecture or shape">margins dentate;</span> <span class="statement" id="st-d0_s15" data-properties="apex shape;apex shape;apex shape;apex shape;apex shape;apex shape">apex notched, pointed, rounded, or blunt.</span> <span class="statement" id="st-d0_s16" data-properties="vein fusion;vein prominence"><b>Veins </b>free, evident.</span> <span class="statement" id="st-d0_s17" data-properties="sorus count;side orientation;side orientation"><b>Sori </b>1–2 per segment, on both basiscopic and acroscopic sides.</span> <span class="statement" id="st-d0_s18" data-properties=""><b>Spores </b>abortive.</span> <span class="statement" id="st-d0_s19" data-properties="spore development;2n chromosome count">2n = ca. 180.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>proliferous. <b>Stems</b> erect, not branched; scales blackish throughout, linear-deltate, sparse, 1–1.3 × 0.1–2.4 mm, margins entire. <b>Leaves</b> nearly monomorphic. <b>Petiole</b> green, becoming blackish in older leaves, 1–5(–12) cm, 1/8–1/3 length of blade; indument of black, narrowly lanceolate scales. <b>Blade</b> dull, linear, 2-pinnate, (4–)12–22 × 1–3.5 cm, papery, glabrous; base slightly tapered; apex narrowing gradually, not rooting. <b>Rachis</b> mostly blackish, green distally and in juvenile leaves, shiny, sparsely scaly. <b>Pinnae</b> in 9–20 pairs, oblong, 0.5–2 × 0.4–1.3 cm; apex blunt to truncate. <b>Pinnules</b> of 1–2 segments; segments linear-oblong, 3–6 × 1–3 mm; margins dentate; apex notched, pointed, rounded, or blunt. <b>Veins</b> free, evident. <b>Sori</b> 1–2 per segment, on both basiscopic and acroscopic sides. <b>Spores</b> abortive. <b>2n</b> = ca. 180.</span><!-- |
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| |publication year=1904 | | |publication year=1904 |
| |special status= | | |special status= |
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_120.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_120.xml |
| |genus=Asplenium | | |genus=Asplenium |
| |species=Asplenium ×biscayneanum | | |species=Asplenium ×biscayneanum |
− | |2n chromosome count=180
| |
− | |apex architecture=not rooting
| |
− | |apex shape=blunt;rounded;blunt;rounded;pointed;notched;blunt;truncate
| |
− | |apex width=narrowing
| |
− | |base shape=tapered
| |
− | |blade architecture or shape=2-pinnate
| |
− | |blade arrangement or course or shape=linear
| |
− | |blade atypical length=4cm;12cm
| |
− | |blade length=12cm;22cm
| |
− | |blade pubescence=glabrous
| |
− | |blade reflectance=dull
| |
− | |blade texture=papery
| |
− | |blade width=1cm;3.5cm
| |
− | |leaf architecture=monomorphic
| |
− | |leaf life cycle=juvenile;older
| |
− | |margin architecture or shape=dentate;entire
| |
− | |pair count=9;20
| |
− | |petiole atypical some measurement=5cm;12cm
| |
− | |petiole coloration=blackish;green
| |
− | |petiole length=1/8 length of blade;1/3 length of blade
| |
− | |petiole some measurement=1cm;5cm
| |
− | |pinna length=0.5cm;2cm
| |
− | |pinna shape=oblong
| |
− | |pinna width=0.4cm;1.3cm
| |
− | |rachis architecture or pubescence=scaly
| |
− | |rachis coloration=green;blackish
| |
− | |rachis reflectance=shiny
| |
− | |root reproduction=proliferous
| |
− | |scale coloration=black;blackish
| |
− | |scale count or density=sparse
| |
− | |scale length=1mm;1.3mm
| |
− | |scale shape=lanceolate;linear-deltate
| |
− | |scale width=0.1mm;2.4mm
| |
− | |segment count=1;2
| |
− | |segment length=3mm;6mm
| |
− | |segment shape=linear-oblong
| |
− | |segment width=1mm;3mm
| |
− | |side orientation=acroscopic;basiscopic
| |
− | |sorus count=1;2
| |
− | |spore development=abortive
| |
− | |stem architecture=not branched
| |
− | |stem orientation=erect
| |
− | |vein fusion=free
| |
− | |vein prominence=evident
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| -->[[Category:Treatment]][[Category:Asplenium]] | | -->[[Category:Treatment]][[Category:Asplenium]] |
Roots proliferous. Stems erect, not branched; scales blackish throughout, linear-deltate, sparse, 1–1.3 × 0.1–2.4 mm, margins entire. Leaves nearly monomorphic. Petiole green, becoming blackish in older leaves, 1–5(–12) cm, 1/8–1/3 length of blade; indument of black, narrowly lanceolate scales. Blade dull, linear, 2-pinnate, (4–)12–22 × 1–3.5 cm, papery, glabrous; base slightly tapered; apex narrowing gradually, not rooting. Rachis mostly blackish, green distally and in juvenile leaves, shiny, sparsely scaly. Pinnae in 9–20 pairs, oblong, 0.5–2 × 0.4–1.3 cm; apex blunt to truncate. Pinnules of 1–2 segments; segments linear-oblong, 3–6 × 1–3 mm; margins dentate; apex notched, pointed, rounded, or blunt. Veins free, evident. Sori 1–2 per segment, on both basiscopic and acroscopic sides. Spores abortive. 2n = ca. 180.
Habitat: Hammocks, on limestone rock faces
Elevation: 0–20 m
Discussion
Asplenium × biscayneanum is the hybrid of A. trichomanes-dentatum and A. verecundum, with which it occurs. This peculiar spleenwort may most readily be separated from A. trichomanes-dentatum by its deeply cut pinnae, and from A. verecundum by being only 2-pinnate and having long petioles. Chromosome pairing in A. × biscayneanum is irregular. Judging from herbarium collections, it shows considerable hybrid vigor. All the collections are from Dade County, Florida, where it may now be extirpated.
Selected References
None.