I'm looking to ID this flowering plant I shot at the VanDusen (in Vancouver, BC) on 17 May. It was in their White Garden, but otherwise unidentified. At first I thought it was a Sisyrinchium albidum but the petal shape is different. Any suggestions would be welcome. See the attachment.
It is Cerastium tomentosum (Snow-in-Summer) https://www.google.ca/search?q=cerastium+tomentosum&biw=999&bih=630&source=lnms&tbm=isch&sa=X&ei=9N9jVZIkieugBJrqg6AP&sqi=2&ved=0CAYQ_AUoAQ