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Dryopteris marginalis ye una especie de felechu perteneciente a la familia Dryopteridaceae.
Tien fueyes perennes qu'algamen un llargor máximu de 1.2 m, con una corona individual en cada portainjerto. Los soros atopar nos marxes del texíu de la fueya, d'ende'l nome común (marxinal). Xusto primero que maureza la espora, los soros adquieren un interesante color azul-violáceo.
Alcuéntrase nes zones húmedu y avisiegu de too l'este d'América del Norte. Favorezlu moderadamente los suelos acedos a circumneutral. Apaez nes árees más fresques, pero ye abondo resistente a la seca una vegada establecíu. Nes partes más calientes del so hábitat, lo más probable ye que s'atopen nes parés predreses non caliares empobinaes al norte.
El raigañu úsase como vermífugo.[1]
Dryopteris marginalis describióse por (L.) Gray y espublizóse en A Manual of the Botany of the Northern United States 632. 1848.[2]
Dryópteris: nome xenéricu que remanez del griegu dryopterís = nome d'un felechu. En Dioscórides, de felechu (gr. pterís) que naz sobre los carbayos (gr. drys)]
marginalis: epítetu llatín que significa "marxinal".[3]
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Esta páxina forma parte del wikiproyeutu Botánica, un esfuerciu collaborativu col fin d'ameyorar y organizar tolos conteníos rellacionaos con esti tema. Visita la páxina d'alderique del proyeutu pa collaborar y facer entrugues o suxerencies. Dryopteris marginalis ye una especie de felechu perteneciente a la familia Dryopteridaceae.
Dryopteris marginalis, vernacularly known as the marginal shield fern or marginal wood fern, is a perennial species of fern found in damp shady areas throughout eastern North America, from Texas to Minnesota and Newfoundland. It favors moderately acid to circumneutral soils in cooler areas but is fairly drought-resistant once established. In the warmer parts of its range, it is most likely to be found on north-facing non-calcareous rock faces. It is common in many altitudes throughout its range, from high ledges to rocky slopes and stream banks.[3] Marginal wood fern's name derives from the fact that the sori are located on the margins, or edges of the leaflets.
Dryopteris marginalis is an evergreen fern throughout its range, along with Christmas fern (Polystichum acrostichoides) it is one of the few evergreen ferns. Marginal wood fern grows from a clump with a prominent central rootstock, this rootstock may be exposed and give this fern the appearance of being like a small tree fern. Often, the dead leaves will accumulate beneath the plant. The stipe, or stem which supports the leaf is approximately 1/4 the length of the leaf and covered in bright golden brown scales.[3] The stipe itself is grooved on the upward-facing side and dark red-brown at the base and becoming green further up the leaf.[4]
The leaf is a dark blue-green and thick and leathery in texture.[3] It grows 1–2 ft in height and approximately 6 in wide. Each leaf is broken up into leaflets which are arranged on either side of the main stalk. The tips of these leaflets are generally curved toward the tip of the leaf. These leaflets themselves are divided into subleaflets which are blunt-tipped and either serrated or lobed. The fertile leaflets (leaflets bearing sori and spores) are similar to the fertile leaflets in size and appearance.[5] The round sori are located on the margins of the leaf tissue. Before the sori are ripe they start gray then they turn an interesting blue-violet color before finally turning brown when they are mature. The sori are covered in a kidney-shaped indusium which is smooth.[4]
Dryopteris marginalis has a wide distribution in the northeastern USA. It was found for the first time in Minnesota in 1981, and likely was part of the native flora for a long time but overlooked because of its rarity and its close resemblance to related species.[6] It is listed as a threatened species in Minnesota, not so much because the species is currently threatened, but because there is only one population found on an east-facing bluff composed of sandstone that is capped with limestone.[6] In other parts of its range it is found in woods, on talus-slopes, in rocky areas and walls, on wooded slopes and ravines, and at the edges of woods, streams and roads.[5]
Dryopteris marginalis is grown in gardens in part to full shade, it is an evergreen non-spreading fern that forms a vase-shaped clump of leathery, deeply cut fronds. It is used in shade gardens, rock gardens, and native plantings. There are no serious insect or disease problems that affect it and it is winter hardy in USDA zones 3-8.[7]
Dryopteris marginalis is known to form hybrids with 10 other species and some of the hybrids are common, they can be identified by the malformed spores and sori which are not quite on the margins of the leaves.
Showing leaflets
Showing sori
Botanical illustration
Scales on stalk
Dryopteris marginalis, vernacularly known as the marginal shield fern or marginal wood fern, is a perennial species of fern found in damp shady areas throughout eastern North America, from Texas to Minnesota and Newfoundland. It favors moderately acid to circumneutral soils in cooler areas but is fairly drought-resistant once established. In the warmer parts of its range, it is most likely to be found on north-facing non-calcareous rock faces. It is common in many altitudes throughout its range, from high ledges to rocky slopes and stream banks. Marginal wood fern's name derives from the fact that the sori are located on the margins, or edges of the leaflets.
Dryopteris marginalis es una especie de helecho perteneciente a la familia Dryopteridaceae.
Tiene hojas perennes que alcanzan una longitud máxima de 1.2 m, con una corona individual en cada portainjerto. Los soros se encuentran en los márgenes del tejido de la hoja, de ahí el nombre común (marginal). Justo antes de que madure la espora, los soros adquieren un interesante color azul-violáceo.
Se encuentra en las zonas húmedas y sombreadas de todo el este de América del Norte. Le favorece moderadamente los suelos ácidos a circumneutral. Aparece en las áreas más frescas, pero es bastante resistente a la sequía una vez establecido. En las partes más calientes de su hábitat, lo más probable es que se encuentran en las paredes rocosas no calcáreas orientadas al norte.
La raíz se usa como vermífugo.[1]
Dryopteris marginalis fue descrita por (L.) Gray y publicado en A Manual of the Botany of the Northern United States 632. 1848.[2]
Dryópteris: nombre genérico que deriva del griego dryopterís = nombre de un helecho. En Dioscórides, de helecho (gr. pterís) que nace sobre los robles (gr. drys)]
marginalis: epíteto latino que significa "marginal".[3]
Dryopteris marginalis es una especie de helecho perteneciente a la familia Dryopteridaceae.
Dryopteris marginalis, ou dryoptère à sores marginaux, est une espèce de fougères du genre Dryopteris appartenant à la famille des Dryopteridaceae que l'on trouve à l'est de l'Amérique du Nord et au Groenland.
Cette espèce monomorphe sempervirente mesure de 30 cm à 1 mètre de hauteur et de 10 à 25 cm de largeur. Elle est caractérisée par ses sores de forme ronde à la marge du tissu foliaire. Ils virent au violet juste avant leur maturité.
Dryopteris marginalis apprécie l'ombre des terrains humides ou marécageux, les sols moyennement acides ou neutres. Elle croît également sur les pentes rocheuses non-calcaires, exposées au nord, à l'ombre de sous-bois, jusqu'à 1 500 mètres d'altitude.
Dryopteris marginalis, ou dryoptère à sores marginaux, est une espèce de fougères du genre Dryopteris appartenant à la famille des Dryopteridaceae que l'on trouve à l'est de l'Amérique du Nord et au Groenland.
Листя мономорфне, зелене взимку, 30–100 × 10–25 см. Черешок 1/4–1/3 довжини листя, лущені при основі; луски в щільних пучках, блідо-рудувато-коричневі. Листові пластини голубувато-зелені, яйцеподібно-ланцетні. Круглі соруси розташовані на полях листкової тканини. До того як соруси дозріють, вони сірі, після чого вони набувають цікавого блакитно-фіолетового кольору, перш ніж нарешті стають коричневими, коли вони зрілі. Відомо, що Dryopteris marginalis утворює гібриди з 10 іншими видами, а деякі гібриди є загальними, вони можуть бути ідентифіковані неправильними спорами та сорусами, які не є повністю на краях листя. 2n=82.
Північна Америка: схід Канади, схід США, південь Гренландії. Також культивується. Населяє скелясті, лісисті схили та яри, кромки гаїв, береги річок та узбіччя, кам'яні стіни; на висотах 50–1500 м.
Dryopteris marginalis là một loài thực vật có mạch trong họ Dryopteridaceae. Loài này được (L.) A. Gray miêu tả khoa học đầu tiên năm 1848.[2]
Dryopteris marginalis là một loài thực vật có mạch trong họ Dryopteridaceae. Loài này được (L.) A. Gray miêu tả khoa học đầu tiên năm 1848.
