Monophyletic (Der et al., 2009; Zhou et al., 2014; Wolf et al., 2015). Species number uncertain. About 20 morphotypes have been recognized, but molecular evidence points to just 2 diploid species plus 2 allotetraploid hybrids.
%LABEL% (%SOURCE%)
Monophyletic (Der et al., 2009; Zhou et al., 2014; Wolf et al., 2015). Species number uncertain. About 20 morphotypes have been recognized, but molecular evidence points to just 2 diploid species plus 2 allotetraploid hybrids.
%LABEL% (%SOURCE%)