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Comments

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The morphology of Pellaea bridgesii is so distinctive that its sectional (and even generic) placement in Pellaea has long been a source of contention. W. H. Wagner Jr. et al. (1983) documented the existence of sterile diploid hybrids (called P . × glaciogena ) between P . bridgesii and P . mucronata (see reticulogram), suggesting that P . bridgesii is most closely related to members of sect. Pellaea . In addition to the more obvious characters mentioned above, P . bridgesii is distinguished from other North American species (except P . ternifolia ) by its anastomosing veins.
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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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Description

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Stems compact, ascending, stout, 5--10 mm diam.; scales mostly weakly bicolored, linear-subulate, 0.1--0.3 mm wide, centers dark brown, thin, margins lighter, thin, denticulate to entire. Leaves monomorphic, clustered on stem, 7--30 cm; croziers nearly glabrous. Petiole dark brown, lustrous, rounded adaxially, without prominent articulation lines. Blade linear, 1-pinnate, 1.5--4 cm wide; rachis brown throughout, straight, rounded adaxially, glabrous. Pinnae perpendicular to slightly ascending, usually not decurrent on rachis, simple and unlobed; costae absent. Ultimate segments broadly ovate to elliptic, 7--20 mm, leathery, glabrous; margins plane, not recurved, not covering abaxial surface, borders whitish, entire; apex obtuse to rounded. Veins of ultimate segments obscure. Sporangia sessile or subsessile, containing 64 spores, intermixed with abundant farina-producing glands. 2 n = 58.
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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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Distribution

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Calif., Idaho, Nev., Oreg.
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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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Habitat

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Sporulating summer--fall. Rocky slopes and cliffs, on granitic substrates; 1200--3600m.
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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.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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Pellaea bridgesii

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Pellaea bridgesii is a species of fern known by the common name Bridges' cliffbrake. It is native to an area of the western United States from northern California to Idaho, where it grows in rocky granitic cliffs and slopes.

Pellaea bridgesii grows from a branching brown rhizome. Each leaf is up to 30 or 35 centimeters long. It is composed of a straight brown rachis lined with widely spaced leathery, blue-green leaflets which are round to oval and sometimes folded over. The edges of the leaflets are not rolled under and do not cover the sporangia on the undersides.

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Pellaea bridgesii: Brief Summary

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Pellaea bridgesii is a species of fern known by the common name Bridges' cliffbrake. It is native to an area of the western United States from northern California to Idaho, where it grows in rocky granitic cliffs and slopes.

Pellaea bridgesii grows from a branching brown rhizome. Each leaf is up to 30 or 35 centimeters long. It is composed of a straight brown rachis lined with widely spaced leathery, blue-green leaflets which are round to oval and sometimes folded over. The edges of the leaflets are not rolled under and do not cover the sporangia on the undersides.

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Pellaea bridgesii ( Spanish; Castilian )

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Pellaea bridgesii es una especie de helecho de la familia botánica Pteridaceae. Es originaria del oeste de los Estados Unidos desde el norte de California a Idaho, donde crece en los acantilados y laderas de granito.

Descripción

Pellaea bridgesii crece a partir de rizoma con una ramificación de color marrón. Cada hoja tiene hasta 30 o 35 centímetros de largo. Se compone de un raquis con hojas muy espaciadas entre sí, las hojas azules y verdes son redondas u ovaladas y, a veces dobladas. Los bordes se pliegan por debajo y no cubren los esporangios en el envés.

Taxonomía

Pellaea bridgesii fue descrita por William Jackson Hooker y publicado en Species Filicum 2: 238, pl. 142b. 1858.[1][2]

Referencias

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Pellaea bridgesii: Brief Summary ( Spanish; Castilian )

provided by wikipedia ES

Pellaea bridgesii es una especie de helecho de la familia botánica Pteridaceae. Es originaria del oeste de los Estados Unidos desde el norte de California a Idaho, donde crece en los acantilados y laderas de granito.

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Pellaea bridgesii ( French )

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Pellaea bridgesii est une espèce de fougère de la famille des Pteridaceae originaire de l'ouest des États-Unis du nord de la Californie à l'Idaho, où elle pousse dans les falaises rocheuses et les pentes granitiques.

Elle pousse à partir d'une ramification d'un rhizome brun. Chaque feuille fait jusqu'à 30 ou 35 centimètres de long. Elle est composée d'un rachis droit brun portant des folioles largement espacés, bleu-vert, de forme ronde à ovale, à l'aspect de cuir et parfois repliés. Les bords des folioles ne s'enroulent pas et ne couvrent pas les sporanges sur la face inférieure.

Galerie

Notes et références

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Pellaea bridgesii: Brief Summary ( French )

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Pellaea bridgesii est une espèce de fougère de la famille des Pteridaceae originaire de l'ouest des États-Unis du nord de la Californie à l'Idaho, où elle pousse dans les falaises rocheuses et les pentes granitiques.

Elle pousse à partir d'une ramification d'un rhizome brun. Chaque feuille fait jusqu'à 30 ou 35 centimètres de long. Elle est composée d'un rachis droit brun portant des folioles largement espacés, bleu-vert, de forme ronde à ovale, à l'aspect de cuir et parfois repliés. Les bords des folioles ne s'enroulent pas et ne couvrent pas les sporanges sur la face inférieure.

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Pellaea bridgesii ( Vietnamese )

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Pellaea bridgesii là một loài dương xỉ trong họ Pteridaceae. Loài này được Hook. mô tả khoa học đầu tiên năm 1858.[1]

Hình ảnh

Chú thích

  1. ^ The Plant List (2010). Pellaea bridgesii. Truy cập ngày 28 tháng 5 năm 2014.

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Pellaea bridgesii: Brief Summary ( Vietnamese )

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Pellaea bridgesii là một loài dương xỉ trong họ Pteridaceae. Loài này được Hook. mô tả khoa học đầu tiên năm 1858.

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