Polystichum scopulinum

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Polystichum scopulinum
Polystichumscopulinum.jpg
Scientific classification
Kingdom: Plantae
Division: Pteridophyta
Class: Pteridopsida
Order: Polypodiales
Family: Dryopteridaceae
Genus: Polystichum
Species: P. scopulinum
Binomial name
Polystichum scopulinum
(D.C.Eaton) Maxon

Polystichum scopulinum is a species of fern known by the common names mountain hollyfern[1] and rock sword fern.[2] It is native to much of western North America, and it is known from disjunct occurrences in eastern Canada, as well.[2] It grows in rocky habitat, often in full sun. It is widespread but mostly found in small populations, and is noted to be most abundant on serpentine soils.[2] This fern produces several erect, narrowly lance-shaped leaves up to 50 centimeters in length. The leaves narrow near the bases. Each leaf is divided into many lance-shaped or oblong leaflets up to 3 centimeters long. The toothed leaflets are sometimes twisted on their axes and overlapping.

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