I downloaded rbcl sequences from NCBI and made a phylogenetic tree. It shows the pygmies and the petiolaris diverging rapidly, and quasi-adaptive radiation on the Petiolaris and Pygmy clade.
I am already crossing Petiolaris x Micrantha, but does anyone have/is willing to carry out any other crosses with other species? I am willing to send an SASE, with a few cuttings as compensation.
Paleacea, Micrantha, Roseana, leucoblasta, etc.. are very good, but scorpioides and similar upright species are too old for crossing, according to MEGA-X genetic analysis.
Thanks for your helps!