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Upper Amazon Creek <br /> 2. Snell Avenue to Fox Hollow Road <br /> a) Existing Conditions <br /> Along this section, there are a lot of different species, but they are less common than on the <br /> upper segment, with many stretches unvegetated with natives. The top of the bank is covered <br /> with mowed grass, not by trees or shrubs. The trees and shrubs are on the slopes. <br /> ASH - COTTONWOOD - WILLOW RIPARIAN FOREST <br /> Canopy <br /> Dominant species <br /> • Fraxinus lati folic Oregon ash <br /> • Populus balsamifera Black cottonwood <br /> • Salix lucida ssp. lasiandra Pacific willow <br /> Associate species <br /> • Alnus rhombifolia White alder <br /> • Alnus rubus Red alder <br /> • Arbutus menzisii Madrone <br /> • Pinus ponderosa Ponderosa pine <br /> • Prunus emarginata var. mollis Bittercherry <br /> • Quercus garryana Oregon white oak <br /> Woody Understory <br /> Dominant species <br /> • Cornus sericea Creek dogwood <br /> • Crataegus douglasii Black hawthorn <br /> • Salix fluviatilis Columbia river willow <br /> • Salix hookeriana Hooker's willow <br /> • Salix scouleriana Scouler's willow <br /> • Salix folic Soft - leaved willow <br /> • Salix sitchensis Sitka willow <br /> • Symphoricarpus albus Snowberry <br /> Associate species <br /> • Berberis aquifolium Tall Oregon grape <br /> • Corylus cornuta var. california California hazel <br /> • Oemelaria cerasiformis Indian plum <br /> • Physocarpus capitatus Ninebark <br /> • Rosa gymnocarpa Baldhip rose <br /> • Rosa nootkana Nootka rose <br /> • Toxicodendron diversiloba Poison oak <br /> 9 <br />