Taxon Report

Polystichum kruckebergii W. Wagner

Kruckeberg's sword fern

Print Report

© 2021 Scot Loring

Classification


Scientific Name:	Polystichum kruckebergii W. Wagner
Common Name:	Kruckeberg's sword fern
Family:	Dryopteridaceae
Element Code:	PPDRY0R0C0
USDA Plants Symbol:	POKR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	2100-3200 (6890-10500)
General Habitats:	Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: False
California Counties and Islands: Name (Code)
San Bernardino (SBD)?, Siskiyou (SIS), Tuolumne (TUO)
Quads: Name (Quad Code)
Dunderberg Peak (3811913), Marble Mountain (4112352), Medicine Lake (4112155)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



SBD Co. records need verification; Parish specimens are likely P. scopulinum. Sensitive in ID, and on watch list in OR. See American Fern Journal 56:4 (1966) for original description, and Pteridologia 1:1-64 (1979) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 January 2025].