This study includes:(1) an investigation of environmental differences which affect plant
growth in the foothill, montane, and alpine belts of Rocky Mountain National Park; and (2) a …

Knowledge of the characteristics of plant root systems is important in the management of
vegetation for optimum soil stabilization, flood reduction, and usable water yield. Roots bind …

METHODS All of the material included in the present study was obtained at timberline on the
east slope of the Medicine Bow Range of the Rocky Mountains, Wyoming, between June 16 …

INTRODUCTION Root developittent ill gr: issland has been sht1 (lied ianv Xyetars. A survey
of the underground plant parts in the Palouse Prairie of southeastern Washington was naide …

The distribution of forest communities on Pine Mountain, in the Cumberland Mountains of
southeastern Kentucky, is in the main controlled by slope exposure and soil. These are …

Comparatively little has been done on this continent in the investigation of environmental
conditions and plant succession in the alpine zone of the high mountains and in the arctic …

The purpose of this study was to examine the nature and extent of development of
underground parts of each of the principal species of native grassland of southern …

A latitudinal sequence of vegetation diagrams is presented, each relating the forest
vegetation of a region of the southern Rocky Mountain Physiographic Province to elevation …

During a preliminary survey of the vegetation of the western Great Basin, numerous isolated
patches of yellow pine (Pinus ponderosa and P. jeffreyi) 2 were observed in the sagebrush …

One of the most striking characteristics of the landscapes of north-central Canada is the
monotony of the sky-line. A jagged horizon of spruce tops meets the eye everywhere except …