Alnus alnobetula subsp. crispa
green alder
Betulaceae (Birch family)
Introduction to Vascular Plants
green alder
Betulaceae (Birch family)
Introduction to Vascular Plants
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Map
Distribution of Alnus alnobetula subsp. crispa
Click here to view the full interactive map and legend
Species Information
General:
Deciduous shrub or tree, 1-5 m tall; pointed axillary buds without stalks; bark scaly, sometimes lichen-covered, yellowish-brown or grey.
Leaves:
Alternate, deciduous, smooth, finely toothed 1-2 times, oval with pointed tips, 4-10 cm long, brownish in the fall.
Flowers:
Inflorescence of male and female catkins which open at the same time as the leaves on current year's growth; male catkins unstalked.
Fruits:
Small nutlets, with broad wings; female cones 1.5-2 cm long, egg-shaped.
Notes:
Three subspecies occur in BC.
Ecology
Ecological Framework for Alnus alnobetula ssp. crispa
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) |
924 | 10 | 2094 |
| Slope
Gradient (%) |
14 | 0 | 83 |
|
Aspect (degrees) |
338 | 0 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 0 | 7 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
355 | ||
| Modal
BEC Zone Class |
SBS | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BWBS(55), CWH(24), ESSF(58), ICH(47), IDF(4), MS(17), SBPS(3), SBS(124), SWB(3) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Moist slopes, streambanks, avalanche tracks, bogs and fens in all zones; ssp. crispa frequent in N BC, ssp. sinuata common throughout S BC, becoming less frequent and transitional to ssp. crispa in N BC; circumboreal, E to PQ and S to NC, MN, CO and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Alnus crispa (Aiton) Pursh
Alnus crispa subsp. crispa
Alnus crispa var. elongata Raup
Alnus crispa var. mollis (Fern.) Fern.
Alnus viridis subsp. fruticosa (Rupr.) Nyman
Alnus viridis var. crispa (Aiton) House
Duschekia viridis (Chaix) Opiz p.p.