Saxifrage family. More common names: Bulbiferous Fringecup, Bulbiferous Prairiestar; Lithophragma bulbifera Rydb.
-- Karl Holte

This is one of my favorites, too; it is one (we have two species that are common here) in the Lithophragma genus (Woodland Star, Prairie Star are a couple of the common names; Fringecup is another). The overall plant and the stems and leaves help make the determination; I suspect because of the maroon appearance of the stem and the fact that we are on the early side of the season that this is Bulbiferous (or Bulblet) Fringecup / Bulbiferous Prairie Star -- Lithophragma bulbifera Rydb. [and one website says "Evidently the USDA has renamed this species to Lithophragma glabrum."]

http://ghs.gresham.k12.or.us
/science/ps/nature/gorge
/5petal/saxi/bulblet.htm

http://ghs.gresham.k12.or.us
/science/ps/nature/gorge
/5petal/saxi/smooth.htm
--Ruth Moorhead