What exactly is unique about the so-called Poncirus trifoliata 'English Large'?

I've also heard it referred to as 'English Large-Flowered' -- is that the correct name?

Is it only the flowers that tend to be larger than the typical trifoliata? Or is the fruit larger as well?

Any difference in hardiness?

A similar question came up a while back.
link
I'm not sure there was much in the way of conclusions, except that according to this doc from the other thread: http://ucce.ucdavis.edu/files/repositoryfiles/ca1505p10-64851.pdf English Large and English Small are both small flowered selections

In west poncirus classified into 2broad groups:- large and small based on flower size/leaf morphology


It is not an exact rule but large flowers are supposed to go with larger leaves and greater vigour in top stock. Small flower, small leaves etc.

Inexactitude shown by rubidoux which is a large flowered type irgo larger leaves but gives only medium vigour to citrus graft.

Interestingly in orient a different way of assessing poncirus as rootstock is used and some selections, including ones regularly used in west, are deemed incompatable with citrus.


Have seen nothing that suggests significant differences in fruit or hardiness.

Till did bring up question if fast flowering trifoliate was less hardy in another thread. Those that have it in europe seem to be implying low vigour?

The reason for my asking was Citrandarin US-852 is a hybrid of Citrus reticulata 'Changsha' and P. trifoliata 'English Large' (or English Large-flowered). But the fruit seems like it's larger than either of the fruit of the parents.

Or maybe I've just never seen the actual fuit size of a real healthy Changsha.

have you seen fruits of us 852?
do you have pictures?