Difference between revisions of "Adiantum tenerum"
Prodr. 135. 1788.
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|common_names=Brittle maidenhair | |common_names=Brittle maidenhair | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
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| − | --><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>short-creeping; scales bicolored, centers dark reddish brown, margins pale tan, erose-ciliate. <b>Leaves</b> arching or sometimes pendent, closely spaced, 20–110 cm. <b>Petiole</b> 1–3 mm diam., glabrous, occasionally glaucous. <b>Blade</b> trowel-shaped, pinnate, 12–60 × 12–60 cm, gradually reduced distally, glabrous; proximal pinnae 3-pinnate; rachis straight, glabrous, not glaucous. <b>Segment</b> stalks 1–5 mm, with dark color ending abruptly at segment base, terminating in cupulelike swelling at base of segment (unlike any other species of Adiantum in the flora). <b>Ultimate</b> segments fan-shaped or rhombic, about as long as broad; base cuneate; apex rounded or acute, lobed, lobes separated by narrow incisions 0.5 mm wide. <b>Indusia</b> transversely oblong to crescent-shaped, 0.5–2 mm, glabrous. <b>Spores</b> mostly 40–58 µm diam. <b>2n</b> = 60.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>short-creeping; scales bicolored, centers dark reddish brown, margins pale tan, erose-ciliate. <b>Leaves</b> arching or sometimes pendent, closely spaced, 20–110 cm. <b>Petiole</b> 1–3 mm diam., glabrous, occasionally glaucous. <b>Blade</b> trowel-shaped, pinnate, 12–60 × 12–60 cm, gradually reduced distally, glabrous; proximal pinnae 3-pinnate; rachis straight, glabrous, not glaucous. <b>Segment</b> stalks 1–5 mm, with dark color ending abruptly at segment base, terminating in cupulelike swelling at base of segment (unlike any other species of <i>Adiantum</i> in the flora). <b>Ultimate</b> segments fan-shaped or rhombic, about as long as broad; base cuneate; apex rounded or acute, lobed, lobes separated by narrow incisions 0.5 mm wide. <b>Indusia</b> transversely oblong to crescent-shaped, 0.5–2 mm, glabrous. <b>Spores</b> mostly 40–58 µm diam. <b>2n</b> = 60.</span><!-- |
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|elevation=0–50 m | |elevation=0–50 m | ||
|distribution=Fla.;e;s Mexico;Central America in Guatemala;Honduras;Nicaragua;Costa Rica;South America in Venezuela. | |distribution=Fla.;e;s Mexico;Central America in Guatemala;Honduras;Nicaragua;Costa Rica;South America in Venezuela. | ||
| − | |discussion=<p>Adiantum tenerum is readily distinguished from other species in the flora by the ultimate segments conspicuously articulate to the stalks.</p> | + | |discussion=<p><i>Adiantum tenerum</i> is readily distinguished from other species in the flora by the ultimate segments conspicuously articulate to the stalks.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Adiantum tenerum | name=Adiantum tenerum | ||
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|authority=Swartz | |authority=Swartz | ||
|rank=species | |rank=species | ||
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|publication title=Prodr. | |publication title=Prodr. | ||
|publication year=1788 | |publication year=1788 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_434.xml |
|genus=Adiantum | |genus=Adiantum | ||
|species=Adiantum tenerum | |species=Adiantum tenerum | ||
Latest revision as of 20:23, 5 November 2020
Stems short-creeping; scales bicolored, centers dark reddish brown, margins pale tan, erose-ciliate. Leaves arching or sometimes pendent, closely spaced, 20–110 cm. Petiole 1–3 mm diam., glabrous, occasionally glaucous. Blade trowel-shaped, pinnate, 12–60 × 12–60 cm, gradually reduced distally, glabrous; proximal pinnae 3-pinnate; rachis straight, glabrous, not glaucous. Segment stalks 1–5 mm, with dark color ending abruptly at segment base, terminating in cupulelike swelling at base of segment (unlike any other species of Adiantum in the flora). Ultimate segments fan-shaped or rhombic, about as long as broad; base cuneate; apex rounded or acute, lobed, lobes separated by narrow incisions 0.5 mm wide. Indusia transversely oblong to crescent-shaped, 0.5–2 mm, glabrous. Spores mostly 40–58 µm diam. 2n = 60.
Phenology: Sporulating throughout the year.
Habitat: Restricted to moist, shaded, limestone ledges, sink walls, and grottoes in the flora
Elevation: 0–50 m
Distribution
Fla., e, s Mexico, Central America in Guatemala, Honduras, Nicaragua, Costa Rica, South America in Venezuela.
Discussion
Adiantum tenerum is readily distinguished from other species in the flora by the ultimate segments conspicuously articulate to the stalks.
Selected References
None.