This shrub's fruit reminds me of a hawthorn, but I do not see long sharp thorns like I would expect, only short spikes - so what is this and more importantly can I eat it like a hawthorn fruit? The plants seem to live without much water aside from a fairly rainy climate. This is in the Seattle area - hardiness zone 7.
Check out Rosa rugosa. There are several cultivars, with different coloured flowers. They're tough roses, widely used in amenity landscaping.
This is CLEARLY a rose - I can't believe I didn't see that earlier. The Wikiedia article on their accessory fruits has a good picture. And yes - rose hips have culinary purposes.