These I trampled by the hundreds........

but, without knowing what they are !
Found some in my flower bed when I was shooting Chinese ground orchids.
Each flower about 5-6mm across.
btw : I am in Richmond, BC.

 

a yellow wood sorrel. Oxalis sp maybe?

 

Thanks a lot.
Oxalis stricta - Yellow Woodsorrel.
Reminds me of O. corymbosa - Pink Woodsorrel, which we imbibed for the sour taste
when we were children.