Trisha Shetty

Polystichum aculeatum

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Kingdom  Plantae
Order  Polypodiales
Genus  Polystichum
Higher classification  Polystichum
Division  Pteridophyta
Family  Dryopteridaceae
Scientific name  Polystichum aculeatum
Rank  Species
Polystichum aculeatum Buy hard shield fern Polystichum aculeatum Delivery by Crocus
Similar  Polystichum, Polystichum setiferum, Polystichum lonchitis, Asplenium scolopendrium, Dryopteridaceae

Polystichum aculeatum, the hard shield-fern, is an evergreen fern native to Europe. It is most abundant in upland regions of the British Isles and western France, where it benefits from the combination of mild winters and moist summers, but also occurs more locally across most of Europe except northern Scandinavia, northern Russia; in the Mediterranean region it is confined to high altitudes. It grows on steep slopes in woodlands.

Polystichum aculeatum Prickly Shield Fern 199379 common name Polystichum aculeatum

The glossy dark green fronds are 30–90 cm long, usually drooping downslope, with typically 3-8 fronds on a mature plant. The fronds are stiff and hard-textured, bipinnate (single-pinnate on small, young plants), with the pinnae opposite on the stalk. Each pinna is 3–11 cm long, with a large upward-pointing pinnule at the base, and the other pinnules decreasing in size toward the pinna tip; the pinnules have bristly tips. Individual fronds live for 1.5-2.5 years and remain attached to the rhizome after withering. The round sori occupy two rows on either side of the midrib of each pinnule and are covered by a centrally-attached, umbrella-like indusium with fringed edges. They produce light yellow spores.

Polystichum aculeatum httpsuploadwikimediaorgwikipediacommonsthu

It is occasionally grown as an ornamental plant in gardens.

Distribution

Ireland. Counties:Down, Antrim and Londonderry. Throughout the British Isles and Europe except for the northern countries.

Polystichum aculeatum Polystichum aculeatum hard shield fernRHS Gardening
Polystichum aculeatum Deeproot Plant Base Online Polystichum aculeatum
Polystichum aculeatum aculeatum

References

Polystichum aculeatum Wikipedia


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Asplenium scolopendrium
Dryopteridaceae
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