Polystichum setigerum (C. Presl) C. Presl
Alaska holly fern (Alaska hollyfern)
Dryopteridaceae (Wood Fern family)
Introduction to Vascular Plants
Alaska holly fern (Alaska hollyfern)
Dryopteridaceae (Wood Fern family)
Introduction to Vascular Plants
Species Information
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.
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration 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)
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 |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
1198 | 915 | 1660 |
| Slope
Gradient (%) |
35 | 10 | 87 |
|
Aspect (degrees) |
248 | 140 | 315 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 3 | 5 |
| Modal
Nutrient Regime
Class |
C | ||
| #
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) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and 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.Status Information
Synonyms
Synonyms and Alternate Names:
Polystichum alaskense Maxon
Polystichum braunii subsp. alaskense (Maxon) Calder & Roy L. Taylor
Polystichum braunii var. alaskense (Maxon) Hultén