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ISLE ROYALE National Park |
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Appendix (continued)
Trees
| Habitat | Occurrence | |
| Balsam fir, Abies balsamea |
Near Lake Superior shore and on moist sites inland. | Very common |
| White spruce, Picea glauca |
Most of island, decreasing toward southwestern uplands. | Very common |
| Black spruce, Picea mariana |
In swamps and bogs. Occasional on dry sites. | Very common |
| Larch (tamarack), Larix laricina |
Swamps and bogs. | Formerly common, now rather scarce |
| White pine, Pinus strobus |
Scattered throughout island. Generally considered a successional species, but may remain in mature forests for a long time. Some individuals live 300 or 400 years. | |
| Red pine, Pinus resinosa |
Scattered in a few small stands on dry sites. | |
| Jack pine, Pinus banksiana |
On ridgetops, rocky slopes, and other dry sites. | Fairly common |
| Northern white-cedar (arborvitae), Thuja occidentalis |
Along harbors, bays, lakeshores, swamps, and moist places inland. Found sparingly on drier sites. Prefers alkaline soil. | Common |
| Balsam poplar, Populus balsamifera |
On beaches and old beach lines. | Fairly common |
| Quaking aspen, Populus tremuloides |
A successional species found on all parts of the island. | Very common |
| Large-toothed aspen, Populus grandidentata |
A successional species in the maple-birch forest area. | Uncommon |
| American hophornbeam, Orstrya virginiana |
Reported only from the central part of Greenstone Ridge. | Very rare |
| Paper birch, Betula papyrifera |
A successional species on all parts of the island. | Very common |
| Yellow birch, Betula lutea |
Upland areas on southwestern third of island. | Common |
| Northern red oak, Quercus rubra |
Considered a successional species in the maple-birch forest. Restricted largely to Greenstone Ridge between Mt. Ojibway and Sugar Mountain and to Red Oak Ridge. | Uncommon |
| American mountain-ash, Sorbus americana |
Occurs primarily in spruce-fir forest areas, particularly in openings, at forest edge, and along the lakeshore. (Not an ash, but a member of the rose family.) | Fairly common |
| Common Apple, Pyrus malus |
At Daisy Farm. Escaped from cultivation. | |
| Chokecherry, Prunus virginiana |
A shrub or small tree, in open areas and forest edge. | |
| Fire cherry, Prunus pensylvanica |
A shrub or small tree, widespread in woods, burns and openings. Heavily suppressed by moose browsing. | |
| Sugar maple, Acer sacoccharum |
A principal species on ridges on southwestern third of island. Occurs on Greenstone Ridge north east to Mt. Ojibway area. | |
| Red maple, Acer rubrum |
On high ridges. Does not grow very tall. | Common |
| Striped maple, Acer pensylvanicum |
Small, slender tree, last reported in 1908 by W. P. Holt as "rare on the island." | |
| Mountain maple, Acer spicatum |
Tall shrub or small bushy tree in moderately shaded forest. | Common |
| White ash, Fraxinus americana |
Rare if at all present | |
| Black ash, Fraxinus nigra |
On wet sites. | Fairly common |
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Last Modified: Sat, Nov 4 2006 10:00:00 pm PST |