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New Mexico Cliff Fern

Woodsia neomexicana Windham

Comments

provided by eFloras
Woodsia neomexicana traditionally has been identified as W . mexicana . Both taxa are tetraploid and may share one parent (M. D. Windham 1993); W . neomexicana is separated from typical W . mexicana by its completely filamentous indusial segments, reduced glandularity, and more northerly distribution. Isozyme data suggest that W . neomexicana is an allotetraploid hybrid between W . phillipsii and the diploid progenitor of W . oregana subsp. cathcartiana (M. D. Windham 1993). As with all allopolyploids, W . neomexicana can vary in the direction of either parent, and some plants (especially those resembling W . phillipsii ) can be difficult to identify. All characters except those controlled directly by ploidy level show this tendency, and spore size remains the most dependable character for distinguishing W . phillipsii and W . neomexicana . This species hybridizes with W . oregana subsp. cathcartiana and W . phillipsii to produce sterile tetraploids and triploids, respectively.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Description

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Stems compact, erect to ascending, with few to many persistent petiole bases of unequal lengths; scales mostly uniformly brown but at least some bicolored with dark central stripe and pale brown margins, narrowly lanceolate. Leaves 4--30 × 1.5--6 cm. Petiole light brown or straw-colored when mature, occasionally darker at very base, not articulate above base, relatively brittle and easily shattered. Blade linear to lanceolate, usually pinnate-pinnatifid proximally, glabrescent to sparsely glandular, never viscid; glandular hairs with thin stalks and slightly expanded tips; rachis with scattered glandular hairs and rare, hairlike scales. Pinnae ovate-deltate to elliptic, longer than wide, abruptly tapered to a rounded or broadly acute apex; largest pinnae with 3--7 pairs of closely spaced pinnules; abaxial and adaxial surfaces glabrescent to sparsely glandular, lacking nonglandular hairs or scales. Pinnules dentate, often shallowly lobed; margins nonlustrous, thin, with occasional glands, lacking cilia, with 1--2-celled translucent projections on teeth. Vein tips occasionally enlarged to form whitish hydathodes visible adaxially. Indusia of narrow, filamentous segments, these uniseriate for most of length, composed of ± isodiametric cells, usually surpassing mature sporangia. Spores averaging 44--52 µm. 2 n = 152.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

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Ariz., Colo., N.Mex., Okla., S.Dak., Tex.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Habitat

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Sporulating summer--fall. Cliffs and rocky slopes; usually on sandstone or igneous substrates; 300--3500m.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Woodsia neomexicana

provided by wikipedia EN

Woodsia neomexicana, the New Mexican cliff fern, is a fern species native to the Southwestern United States and northern Mexico.

Distribution

The core of its range is in Coahuila, Nuevo León, Zacatecas, New Mexico, southeastern Utah, Arizona, western Texas and southern Colorado, with isolated populations reported from Oklahoma and South Dakota. The plant usually grows in cracks in the sides of cliffs, on top of rocks, etc.[1][2][3]

Description

Woodsia neomexicana has stems that are largely obscured by the persistent bases of scales and dead leaf bases. Leaves are up to 30 cm long, pinnate with pinnatifid pinnules (leaflets) with scattered hairs.[1]

The indusia have narrow, thread-like segments. Spores average about 50 μm in diameter.[1][4][5]

References

"
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Woodsia neomexicana: Brief Summary

provided by wikipedia EN

Woodsia neomexicana, the New Mexican cliff fern, is a fern species native to the Southwestern United States and northern Mexico.

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