Polystichum scopulinum | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Division: | Polypodiophyta |
Class: | Polypodiopsida |
Order: | Polypodiales |
Suborder: | Polypodiineae |
Family: | Dryopteridaceae |
Genus: | Polystichum |
Species: | P. scopulinum
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Binomial name | |
Polystichum scopulinum |
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.
P. scopulinum is probably a fertile allotetraploid with Polystichum munitum as one parent. [3] [4]