Muscari species
iain@auchgourishbotanicgarden.org (Fri, 18 Apr 2014 12:51:14 PDT)

David I think you have Muscari steupii Woronov & Tron Fl. USSR (1935).

It does incredibly well here and frequently flowers in both Autumn & Spring, alledgedly has an albino form but I don't have it. Iain