Taxon Details

Polystichum kruckebergii

Kruckeberg's sword fern

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Taxon Summary:

Polystichum kruckebergii, commonly known as Kruckeberg's sword fern, is a perennial rhizomatous herb in the Dryopteridaceae that is found in California and elsewhere. It occurs within Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 2100 to 3200 meters. Polystichum kruckebergii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

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:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S4
Other Status:
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: Jun-Aug

Elevation:
2100 - 3200 meters
6890 - 10500 feet

General Habitats:

Subalpine coniferous forest
Upper montane coniferous forest

Microhabitat Details:

Microhabitat:

Rocky

Notes

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:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					0
A	B	C	D	X	U
0	0	0	0	0	0

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Alaska (AK), California (CA), Idaho (ID), Montana (MT), Nevada (NV), Oregon (OR), Utah (UT), Washington (WA)

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)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory