Rather interesting problem with upgrade

[Roger]

Yesterday I upgraded my Fedora 19 to Fedora 20 and find that Grub shows 
Fedora 20 option, Centos 6.5 option but does not find my ubuntu 14.04LTS 
installation, instead showing 2 Fedora 19 options.
As far as I can tell nothing of Fedora 19 remains.

I am unfamiliar with how one should get grub to fine the Ububntu 14.04 
boot option?

Thanks in advance for any help
Roger