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Polystichum luctuosum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Polypodiineae
Family:	Dryopteridaceae
Genus:	Polystichum
Species:	P. luctuosum
Binomial name
Polystichum luctuosum (Kunze) T. Moore

Polystichum luctuosum is a species of fern known by the common names Korean rock fern and Tsushima holly fern. It is a small, clump-forming, tufted, evergreen to semi-evergreen fern native to Japan, Korea, Taiwan, China, Vietnam, and Thailand, as well as southern Africa. The fern grows to about 1–1.5 feet in height, with a spread of 1–1.5 feet, with stipe up to 30 cm long, pale to mid-brown, with dark brown to almost black scales, and bi-pinnate, glossy, dark green fronds.

Synonyms

• Aspidium aculeatum var. pallescens Franch.
• Aspidium luctuosum Kunze
• Aspidium tsus-simense Hook.
• Polystichum falcilobum Ching
• Polystichum tsus-simense (Hook.) J. Sm.
• Polystichum tsus-simense var. pallescens Franch.

References

1. English Names for Korean Native Plants (PDF). Pocheon: Korea National Arboretum. 2015. p. 585. ISBN 978-89-97450-98-5. Archived from the original (PDF) on 25 May 2017. Retrieved 16 December 2016 – via Korea Forest Service.

• Index Fil. 95 1858.
• The Plant List entry
• JSTOR entry
• Missouri Botanical Garden entry
• Flora of Zimbabwe entry

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