Earlier this winter Friends of Terwilliger board member Wesley Risher wrote to the City of Portland’sUrban Forestry to find out how to replace the dead Douglas-fir tree (Pseudotsuga Menziesii) planted as part of BES’
It is this beautiful woodland native plant, Oregon Grape, Mahonia aquifolium, that can be found growing along Terwilliger Parkway and throughout most of the city. Oregon designated the Oregon grape blossom as the official state flower in 1899. The following description of this remarkable plant has been adapted from the Portland Nursery website (http://portlandnursery.com/plants/natives/mahonia.shtml).
Friends of Terwilliger volunteers have spent thousands of hours over the past 23 years removing invasive vegetation in Terwilliger Parkway.Perhaps chief among the bad-news invasives is English or Irish ivy.We all know what it looks like and that it is Bad—but what is it, really?
Work continues to re-build the retaining rock wall leading to Eagle Point; part of Terwilliger Parkway. Eagle Point was first identified by Portland city founders as a key viewpoint in the late 1890s. A house was soon built here and stood for over 100 years. It was probably at this time that the retaining rock wall was built. Here’s a photo of the work taken October 30th.
English Ivy (Hedera Helix) was brought to Oregon in the mid-1800’s as a way to remind early settlers of home. What started out as an innocent plan has come to represent one of the toughest problems Portland’s natural areas face today. It now invades more and more of our parks and will ultimately destroy our cherished tree canopy unless we remove it now. By allowing ivy to grow unchecked it will climb trees where it will mature, produce seeds, and continue the “seeds of destruction” by being transported by non-native birds.