Calville d'Ulzen
The record of the National Fruit Collection, at Brogdale in Kent, describes it1:
Thought to be of German origin although this particular variety was received by the National Fruit Trials in 1947 from France. Fruits have crisp flesh with a sweet to subacid flavour.
Sources
- Calville d'Ulzen (accession 1947 - 467), National Fruit Collection, Brogdale, Kent (Defra). Supports: the description quoted; the use; the fruit's size, shape and colours and the flesh, from the collection's characterisation; the picking time at Brogdale (mid october).
- Using whole-genome SNP data to reconstruct a large multi-generation pedigree in apple germplasm, Hélène Muranty and others, BMC Plant Biology 20:2, 2020. Supports: its ploidy, diploid (supplementary table S1).