Mark Smyth reports that Wim Boens writes about double lesser celandines in the latest issue of The Plantsman - there were dozens of varieties discussed in the International Rock Gardener (IRG) 88- April 2017 article from Wim Boens on double forms of Ficaria verna - free for all to download and read here :
http://www.srgc.org.uk/logs/logdir/2017Apr271493318724IRG88.pdf
Cover of The Plantsman December 2017
Cover of the IRG April 2017 - both featuring Wim Boens' articles on Ficaria verna
