Island Stonecrop, also called Spearleaf Stonecrop (Sedum lanceolatum) is an herb and is found in dry and open meadows. A member of the Crassulaceae Family, its range includes 
the Rocky Mountains. WWU SAM Project’s, with 25 observations, extinction slope is 1.00 (extinction doubtful). Bonhoeffer Botanical Gardens has 3 additional species of Stonecrop planted: Pacific Stonecrop (Spreading Stonecrop, Oregon Stonecrop, and Broadleaf Stonecrop. All of these were easily found by WWU and are oft reported by iNaturalist. (UW Burke reports 17 unique stonecrop species.) Certain stonecrop produce a cyanoglycoside that deter predators feeding on them. Butterflies take advantage of this by using Stonecrop as a larval host.
https://plants.usda.gov/core/profile?symbol=SELA
https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Sedum lanceolatum
https://en.wikipedia.org/wiki/Sedum_divergens
https://en.wikipedia.org/wiki/Sedum_oreganum
https://en.wikipedia.org/wiki/Sedum_spathulifolium
https://en.wikipedia.org/wiki/Sedum_lanceolatum
http://www.burkemuseum.org/research-and-collections/botany-and-herbarium/collections/database/results.php?Genus=Sedum&Species=lanceolatum&SourcePage=search.php&IncludeSynonyms=Y&SortBy=DESC&SortOrder=Year
https://burkeherbarium.org/imagecollection/browse.php?Classification=Vascular%20Plants&BrowseBy=Species&OrderBy=CommonName&BeginsWith=S#stonecrop
Various species of stonecrop occur at what frequency along the Pacific Rim?
Comments, content, questions appreciated; email bb@plc215.org