I just ran across a statement about Li that had been in the back of my head for some time but I couldn’t remember the source. Today I ran across it again in Richard Ashton’s Jujube book - “Every province in China that grows jujubes has a variety named Li.” Shanxi Li is simply the Li from Shanxi province which is west/southwest of Beijing. It’s a fairly large province with cold hardiness zones extending from of 5 - 7. It looks like we have at least 4 distinct Li type fruits in the US - Li, Shanxi Li, Li2 and Redlands #4. The potential certainly exists for all of these to be misidentified or confused. I have two Shanxi Li plants from different sources and they are not identical. Neither of them has the wonderful fruit that others have praised.
One of the other interesting points Ashton makes concerns the Yu variety. Roger Meyer could never get Yu to fruit nor can I. It has numerous flowers every year which are significantly smaller than typical jujube flowers so it seems to be from a different genetic background than the other jujubes I grow (I do have one seedling jujube with flowers almost as small as Yu but that tree does set fruit). But Ashton reports that Yu fruited in Chico California, and says it is the same as Silverhill and Tigertooth. I have Silverhill and Yu is definitely different. Roger had both Silverhill and Tigertooth and they both fruited for him so they were clearly different than the Yu he had. Has anyone been able to get fruit from Yu?