Pinus ponderosa is a dominant tree in the Kuchler plant association, the ponderosa shrub forest. Like most western pines, the ponderosa generally is associated with mountainous topography. However, it is found on banks of the Niobrara River in Nebraska.
anal region the part of the perineal region that surrounds the anus. axillary region the area of the upper chest surrounding the axilla, lateral to the pectoral region. epigastric region the abdominal region that is superior and central in location, above the umbilical region and between the two hypochondriac regions.
In Canada, the North American Cordillera is usually divided into three physiographic regions: the western system, the interior system, and the eastern system.n Canada, the North American Cordillera is usually divided into three physiographic regions: the western system, the interior system, and the eastern system.