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I'm thinking the first of Otto's gentians is not really sino-ornata, too pale and the foliage very light green and lax. I'd be surprised if "true" sino-ornata is anywhere around now, down here at least, so many people and nurseries have hybridised intentionally or otherwise, usually based on the original 'Drake's Strain.' Nowadays I give the whole lot the "lumped" name of Asian hybrids, or sino-ornata types. I have them in deep blues (from Ian McNaughton's seed when he was in NZ), mid blues and pale to extremely pale shades and of course a number of different whites. They're all lovely though.