Northern Ontario Plant Database
Northern Ontario Vegetation Type (V-type)
Summary: A mixedwood stand dominated by black spruce, and with trembling aspen as an associate species in the canopy. Tree species that occurred with 30-40% frequency in the canopy layer of sample plots include jack pine, balsam fir, and white birch. A few other tree species occurred with less frequency. Balsam fir and black spruce dominate the regeneration. The shrub layer is composed mainly of scattered low shrubs, including blueberries, prickly wild rose, bush honeysuckle, and Labrador tea. The tall shrub may contain an occasional serviceberry or showy mountain ash.
The rich herb layer contains several dwarf shrubs, including twinflower, dwarf raspberry, and creeping snowberry, as well as the characteristic boreal forest species. Wild sarsaparilla, goldthread, largeleaf aster, and rose twisted-stalk may also be found, while the presence of sweet coltsfoot and kidneyleaf violet indicate calcareous substrates or soils.
Soil & Ecosite Types: The Black Spruce Mixedwood/Herb Rich Vegetation Type (NW-V19) occurs most commonly on Ecosite Types ES 21 (Fir-Spruce Mixedwood, fresh, coarse loamy soil), ES 32 (Fir-Spruce Mixedwood, moist, silty-clayey soil), and ES 14 (Pine-Spruce Mixedwood, sandy soil). It can be found on a variety of fresh to moist, mineral soil types (including S3, S9,S10 and SS6), and occurs most commonly on calcareous, especially in the eastern portions of northwestern Ontario.
Note: The percentage of sample plots that contained overstorey tree species is given in square brackets after each scientific name. Other species are listed in order of frequency, according to the NW-FEC manual.
overstorey:black spruce (Picea mariana) regeneration: