| Polystichum scopulinum | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Polypodiineae |
| Family: | Dryopteridaceae |
| Genus: | Polystichum |
| Species: | P. scopulinum |
| 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]
References
- ↑ USDA, NRCS (n.d.). "Polystichum scopulinum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 12 October 2015.
- 1 2 3 Flora of North America
- ↑ "The Jepson Herbarium".
- ↑ Moreroa, R.E., Deannaa, R., Barboza, G.E., Barrington, D.S. 2019. Historical biogeography of the fern genus Polystichum (Dryopteridaceae) in Austral South America. Molecular Phylogenetics and Evolution 137 (2019) 168–189. doi 10.1016/j.ympev.2019.05.004
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