After reviewing some Astilbe hybrids at the MOBOT and RHS websites, among others, I've some questions about proper naming.
This listing for Astilbe (x arendsii) 'Federsee' explains the (x arendsii) hybrids as "...crosses between A. chinensis, A. japonica, A. thunbergii and A. astilboides..."
http://www.missouribotanicalga...
RHS DB confirms name as (Astilbe 'Federsee' (× arendsii)) here:
http://apps.rhs.org.uk/horticu...
Astilbe (Japonica Hybrid) 'Deutschland' at MOBOT here:
http://www.missouribotanicalga...
Does (Japonica Hybrid) indicate a species cross or a hybrid of A. japonica? Why not A. japonica 'Deutschland'?
Our DB is using x arendsii, how should we deal with these Japonica Hybrids?
