This is the last in the series on narrow-range endemics of the Pacific Northwest of North America.
Regarding Campanula piperi, the late Edward L. Tisch wrote the following haiku:
- The entire sky
- Leans in all directions
- Trying to match your blue.
Although most individual plants have roughly the same shade of blue, Olympic bellflower or Piper’s bellflower can be found in colours ranging from dark-blue to light-sky-blue (often the blues may have a bit of purple) to white. Pure-white flowers are seemingly the rarest; a search of the subalpine rocky areas where Campanula piperi tends to grow resulted in locating only one highly localized population of 5-10 plants out of the perhaps two hundred plants encountered. Due to variation in both colour and flower shape, a number of selections have been made and exist as cultivars. Graham Nicholls discusses many of these cultivars in his book on Dwarf Campanulas and Associated Genera (see Campanula piperi).
Campanula piperi is endemic to the Olympic Mountains of Washington. It is generally a plant of rock crevices, though it can rarely be found in screes. Flowers are present after snow-melt, in July and August. Additional images, if desired, are available from the Burke Museum: Campanula piperi.
The epithet piperi honours Charles Piper, mentioned previously in the week within the entry on Viola flettii.