Difference between revisions of "Adiantum tenerum"
Prodr. 135. 1788.
Common names: Brittle maidenhair
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><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><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
| + | |phenology=Sporulating throughout the year. | ||
|habitat=Restricted to moist, shaded, limestone ledges, sink walls, and grottoes in the flora | |habitat=Restricted to moist, shaded, limestone ledges, sink walls, and grottoes in the flora | ||
|elevation=0–50 m | |elevation=0–50 m | ||
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|basionyms= | |basionyms= | ||
|family=Pteridaceae | |family=Pteridaceae | ||
| + | |phenology=Sporulating throughout the year. | ||
|habitat=Restricted to moist, shaded, limestone ledges, sink walls, and grottoes in the flora | |habitat=Restricted to moist, shaded, limestone ledges, sink walls, and grottoes in the flora | ||
|elevation=0–50 m | |elevation=0–50 m | ||
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|publication year=1788 | |publication year=1788 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_434.xml |
|genus=Adiantum | |genus=Adiantum | ||
|species=Adiantum tenerum | |species=Adiantum tenerum | ||
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-->[[Category:Treatment]][[Category:Adiantum]] | -->[[Category:Treatment]][[Category:Adiantum]] | ||
Revision as of 13:20, 27 July 2019
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.
Lower Taxa
None.