Help identifying plant

Hello,

I can't upload a photo but have a very odd plant growing through my gravel path and would appreciate any help in identifying it.  It seems to grow from small brown bulbs and has a white stem turning dark pink/indigo at the end.  The flowers are four leaves which are mid/light green at the end and dark pink/red near the stem.  When I dig it up there are loads of white stems that fragment very easily.  I have tried to be thorough digging it up but it still comes back.  Thanks for any help.

Is it any of these,

http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp/ks2/science/plants_pt2/plants2/flower_group4.htm

If not try this (indentification process),

http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp/ks2/science/plants_pt2/plants2/tree_id.htm