Posted: 04/09/2014 at 08:51
Geum rivale is Water avens.
There are various forms of it, G.r. snowflake is obviously white and G.r. Leonard's Var. is a double red. G.r. Lemon Drop is a nice pale yellow. Dead easy in damp soil. Need to assiduously dead head or the can seed around and the seed heads do cling to clothes rather badly.