. The Canadian field-naturalist. 48 The Canadian Field-Naturalist Vol. 102. Figure 2. Distribution of/lra//a«wc//cau//5L. in Canada. Based on specimens in the herbaria at Agriculture Canada, Ottawa, Ontario (DAO), National Herbarium, National Museums of Canada, Ottawa, Ontario (CAN), University of Alberta, Edmonton, Alberta (ALTA), University of Montreal, Montreal, Quebec (MT), McGill University, Montreal, Quebec (MTMG). 5. Plant Communities Aralia nudicaulis L. is an important member of forest understory vegetation in the Acadian, Great Lakes-St. Lawrence and Boreal forest regions {sensu Rowe
. The Canadian field-naturalist. 48 The Canadian Field-Naturalist Vol. 102. Figure 2. Distribution of/lra//a«wc//cau//5L. in Canada. Based on specimens in the herbaria at Agriculture Canada, Ottawa, Ontario (DAO), National Herbarium, National Museums of Canada, Ottawa, Ontario (CAN), University of Alberta, Edmonton, Alberta (ALTA), University of Montreal, Montreal, Quebec (MT), McGill University, Montreal, Quebec (MTMG). 5. Plant Communities Aralia nudicaulis L. is an important member of forest understory vegetation in the Acadian, Great Lakes-St. Lawrence and Boreal forest regions {sensu Rowe 1972) of Canada. Although it has been collected as far north as the Yukon and northern British Columbia (Figure 2), it generally is not a significant component of northern boreal plant communities. In more central regions it usually forms large clones in undisturbed communities. Table 1 presents comparative data from forest stands representative of different regions across the country, seven from the Boreal forest region (1-5, 7, 8), one from the Great Lakes-St. Lawrence forest region (6) and one from the Acadian forest region (9). The data are taken from La Roi (1967) and Strong and La Roi (1983). The stand descriptions in Table 1 were chosen not only to represent a wide geographical range but also to represent communities dominated by different overstory species. Aralia nudicaulis is present in Jack Vmt (Pinus banksiana) {sidinA 1), Trembling ks^en{Populus tremuloides) {sidLwds 2 and 3), White Spruce i Piceaglauca)-Fir {Abies balsamea) and Black Spruce dominated stands. Other studies have described A. nudicaulis as common in birch {Betula sp.)-maple {Acer sp.). Red Oak {Quercus borealis). Balsam Poplar {Populus balsamifera), Largetooth Aspen {P. grandidentata) and Sugar Maple {A. saccharum) communities (Amiro and Courtin 1981) as well as Beech {Fagus grandifolia)-map\e forests (Maycock 1961). Thus, A. nudicaulis does not show any clear association with overstory species acr
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