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Upper Amazon Creek <br />Plant Communities: Existing Conditions & Guidelines for Tree and Shrub <br />Plantings <br />1. Martin Street to Snell Avenue <br />a) Existing Conditions <br />This segment of the creek is vegetated with a diverse riparian forest. A lot of different tree and <br />shrub species are in this part. Both banks are covered by plants, but the plantings end abruptly, <br />not far beyond the top of the bank, where routine mowing occurs. <br />ASH — COTTONWOOD — MAPLE RIPARIAN FOREST <br />Canopy <br />Dominant species <br />• Acer macrophyllum Big -leaf maple <br />• Fraxinus latifolia Oregon ash <br />• Populus balsamifera Black cottonwood <br />Associate species <br />• <br />Acer circinatum <br />Vine maple <br />• <br />Alnus rhombifolia <br />White alder <br />• <br />Alnus rubra <br />Red alder <br />• <br />Calocedrus decurrens <br />Incense -cedar <br />• <br />Pinus ponderosa <br />Ponderosa pine <br />• <br />Pseudotsuga menziesd <br />Douglas -fir <br />• <br />Quercus garryana <br />Oregon white oak <br />• <br />Rhamnus purshiana <br />Cascara <br />• <br />Salix lucida ssp. lasiandra <br />Pacific willow <br />7 <br />