In Australia we’ve got the slim leaf kind of taiwanica, that you just have been anticipating.
It’s a very good wanting plant with its slim foliage and huge fruit. The fruit is sort of bitter.
I’ve seen it in 3 Citrus arboretums and it’s immediately recognisable.
Cool to see it in arboretums. It’s totally bitter certainly, apparently it is thought-about as not excellent fruit, however I additionally learn that with sugar it does make good lemonade model drinks. (And likewise I although it was possibly attention-grabbing to make use of it for making hybrids.)
I grew seedlings of it and they’re extremely true to kind, with a just some variants.
It’s attainable that the Australian vegetation got here from the identical USDA supply and it isn’t the suitable one.
It would not be the primary time the plant within the USDA assortment just isn’t precisely proper.However, the vegetation I see on the European Citrus nursery websites typically do not precisely match what I used to be anticipating to see from that selection.
I feel if you’ll find extra info out of Taiwan or Japan it will be begin.
I am at all times completely happy to know the precise identify of a cultivar I’ve, however I assume I simply must discover a actual Nansho Daidai (slim leaves) after which style all of them. I have already got over 50 citrus vegetation and I would acutally prefer to get that quantity down, but when I am unable to discover info to check cultivars, then I am unable to assist however to get them and eradicate the least attention-grabbing ones myself 
I’m positive that the slim leaf Nansho Daidai is current in Europe, however not many nurseries would have it. I am going to attempt to discover somebody for scions.
The vegetation within the photos in your put up from Adavo and Lenzi look extra like Bitter Orange, Citrus aurantium.
Nansho Daidai / Taiwanica can also be referred to as ‘Bitter Orange’. I often say Bitter Orange for aurantium, however each are right. I even have a Furrowed Bitter Orange (Citrus aurantium canaliculata), however these leaves look totally different from each Lenzi’s and Adavo’s Taiwanica.
