I know that there are some nice variegated Poncirus varieties both in Japan and USA, but there aren't any in Europe and so far I haven't been able to obtain viable budwood.
So every year I plant at least one pot full of Poncirus seeds - partly for future rootstocks and partly to find that rare variegated seedling. Except for the early seedling variegation that either disappears or causes premature death, I've failed to find any.
But last autumn (USA = fall) I noticed one potted seedling that had dropped a few leaves, and those leaves seemed to have somewhat unusual yellow markings. I thought it was just the result of some slight mineral deficiency, or perhaps lack of water at some time, but I did label the plant with 'check for variegation'.
This year I've been watching this plant closely, and it definitely has some variegation. Not the hoped for yellow or white, but just a change of green tone on some leaves. Not really very exciting - unless like me you've been searching for years.
The photos show the complete plant about one foot (30cms) tall, and a four-leaflet leaf which happens to show the variegation quite well. This plant has produced a couple of these quadri-foliate leaves. The other pictures are of a new stem and an older twig which both show the lighter streaks which always occur on variegated citrus.
I'm trying to propagated from the most variegated portions of this plant, while still hoping for some truly variegated budwood!
Mike aka Citrange