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Upper Amazon Creek <br /> (iv • Salix sessilifolia Soft - leaved willow <br /> • Salix sitchensis Sitka willow <br /> • Symphoricarpus albus Snowberry <br /> Associate species <br /> • Cornus sericea Creek dogwood <br /> • Crataegus douglasii Black hawthorn <br /> • Rosa gymnocarpa Baldhip rose <br /> b) Guidelines for Tree and Shrub Plantings <br /> No further planting is needed in this reach, as it is currently densely vegetated with native trees <br /> and shrubs. Maintenance of these plantings and management of non - native species should be <br /> continued. <br /> 5. 29th Avenue to 24th Avenue <br /> a) Existing Conditions <br /> This creek segment flows through Amazon Park. In this park are three ash forests that do not <br /> have direct connection to the creek. The channel has just sparse vegetation, and most of the <br /> banks are mowed. <br /> WILLOW RIPARIAN FOREST <br /> Canopy <br /> Dominant species <br /> • Populus balsamifera ssp. tricho. Black cottonwood <br /> • Salix lucida ssp. lasiandra Pacific willow <br /> Associate species <br /> • Alnus rhombifolia White alder <br /> • Alnus rubra Red alder <br /> • Fraxinus latifolia Oregon ash <br /> Woody Understory <br /> Dominant species <br /> • Salix geyeriana Geyer willow <br /> • Salix hookeriana Hooker's willow <br /> • Salix scouleriana Scouler's willow <br /> • Salix sitchensis Sitka willow <br /> 13 <br />