Dahlia imperialis
Kenneth Hixson (Wed, 06 Feb 2008 10:52:18 PST)
lauw
I recently read a french article on the tree dahlia, which states that D
imperialis and D arborescens are two sepârate species
John Bryan's "Bulbs" gives D. arborescens as a synonym
of D. imperialis
Gareth Rowlands "Gardner's Guide to Growing Dahlias"
doesn't list D. arborescens at all.
Ken