The Northwest hosts 4 types of Spirea: Douglas, Rose, White and Pyramid; all are present in Bonhoeffer Gardens. Flowers are in clusters, small and white or pink. The most common
species for our area is the Douglas Spirea, also known as Hardhack or Steeplebush. Spirea’s usefulness to humans is a spotty record, although it is a commonly planted, erosion preventing, wetland species. These 4 Spirea represent .001% of the World’s 400,000 plant species. Many people bet their hard earned $’s at casinos on smaller odds. Perhaps the next generation will find some cure in Spirea’s DNA. Cascadia Floristic Region below 3,500’ elevation has but 900 native plant species. Any 1 of them might hold magic, here we have 4 (and there are 5, but we’d not yet planted a “hitchcockii“! A shrub and a member of the Rosaceae Family, all 4 species grow by Kiosk 04. Pilchuck Learning Center’s sponsored Western Washington State University SAM Project finds little chance of extinction(s) at the present time.
http://naeb.brit.org/uses/search/?string=Spiraea
https://www.plc215.org/wp-content/uploads/2019/02/Kiosk-04.pdf
https://plants.usda.gov/DocumentLibrary/factsheet/pdf/fs_spdo.pdf
https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Spiraea%20splendens
https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Spiraea%20lucida
https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Spiraea%20douglasii
https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Spiraea%20pyramidata
2 of the 5 Spiraea native to the northern Pacific Rim are white, the other 3 can be described as:
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