If you have bought peony seeds from Will Mc Lewin in the earlier years, you will see his seed list is seperated into numbers – theese numbers refers to
1. 1 . 1 – if the seed is wild collected ( numbers 1. – and then number for collected place – futher number for other collections of places in the same area, or sub species of the species )
3 .1.1 – hybrids of the peony herbacaous species
4.1.1 – tree peony species
Here the 4.23.2 – is a hybrid tree peony seed plant from open pollinated tree peonies !