E-Flora BC: Electronic Atlas of the Flora of British Columbia

Polystichum setigerum (C. Presl) C. Presl
Alaska holly fern (Alaska hollyfern)
Dryopteridaceae (Wood Fern family)

Introduction to Vascular Plants

© mary stensvold  Email the photographer   (Photo ID #8809)

E-Flora BC Static Map
Distribution of Polystichum setigerum
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Species Information

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General:
Deciduous or overwintering perennial arising from a short stout rhizome.
Leaves:
Broadly lanceolate, 30-100 cm long, 5-30 cm wide, 2-pinnate, pinnae pinnate again, but their segments on short stalks, finely spiny-toothed with teeth spreading, ascending.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic shady forests, rock outcrops and lava flows in the lowland and montane zones; rare in coastal NW BC; N to AK.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Polystichum setigerum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 915 1198 1660
Slope Gradient (%) 10 35 87
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
140 248 315
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 4 5
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
3
Modal BEC Zone Class
SBS
All BEC Zones (# of stations/zone) species was recorded in: ESSF(1), ICH(1), SBS(1)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Polystichum alaskense Maxon
Polystichum braunii subsp. alaskense (Maxon) Calder & Roy L. Taylor
Polystichum braunii var. alaskense (Maxon) Hultén

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References