CNPS

CNPS Rare Plant Inventory

Species Details

Polystichum kruckebergii

Kruckeberg's sword fern

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Photo of Polystichum kruckebergii
© 2021 Scot Loring 		Photo of Polystichum kruckebergii
©2021 Scot Loring 		Photo of Polystichum kruckebergii
© 2010 Dana York

  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:

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

  Occurrence Data from the CNDDB

Total Occurrences: 0
Element Occurrence Ranks:
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 18 April 2024].