The native floppy disk format/layout or "filesystem" used by Amstrad microcomputers such as the CPC and PCW range and by the Sinclair Spectrum +3 are versions of one that came from CP/M.
In Amstrad parlance it might be referred to as "AMSDOS" and in Spectrum parlance "+3DOS" or "PLUS3DOS". But those names probably more accurately refer the "disk operating systems", ie the extra Basic commands and system APIs used to access the disks, than the format of the disks.
It could perhaps just be "The CP/M format/layout/filesystem". But from reading around, the Amstrad and Speccy each had extra features not from CP/M and there were quite a few versions of CP/M adding features, some of what either came after the Amstrad and Spectrum variants, or just added features those platforms eschewed.
If the Amstrad and Spectrum variants were branches of a specific stage of CP/M with a version number of name, that could well be what I'm looking for. There do seem to be a few suffixed versions of CP/M out there when I Google, such as CP/M-86 and CP/M 2.2. I've also noticed "FDOS" and "BDOS" in use.
When referring to the versions used by the Amstrad and Speccy, which term would not be a misnomer, not be anachronistic, etc?