Sol,
I have broken some of the narrow leaf and purple linkage in 'Watermark King' and 'Borscht' and there's a very wide seedling from 'Silver Song' X 'Polly Bishop' that gives very wide seedlings. All the purples derive from the tectorum selections 'Atropurpureum' and 'Atroviolaceum' and both of these are rather narrow. Polly's 'Dark Cloud' and 'Plumb Rose' are both broader and a couple of the German hybrids from 'Dark Cloud' have good width as does 'Leopold'. I have also taken the narrow ones to each other and have one 8-10" near black with long narrow and curved leaves with year round color. That is one being evaluated for introduction. So you can go both ways in terns of width. I never thought of going really narrow originally but with inbreeding I obviously had genes for narrow leaves going back to the progenitors of the dark rosettes. These ultra narrow ones obviously have concentrated these narrow genes.
The ('Silver Song' X 'Polly Bishop' )F2 striped one stays striped all year. It has longitudinal stripes of dark purple on a silver ground color. I have one that is pink on silver that fades in the summer to all pale pink. It has extremely round leaves. Both are interesting.
Kevin