Scilla, unknown species

This is a scilla that I had from a small nursery without any label. Flowering period is now and the inflorescence is complex. I guess Scilla latifolia but I'm not sure. Any ideas?

Post scriptum 22 November 2011: I visited last week the Botanical Garden of Barcellona, and was happy to be able to confirm my species diagnosis. It's Scilla latfolia. It's a nice species growing on Tenerife and Lanzerote.  So it's clear for me that I have an additional potted plant, this species will not survive our winter temperatures: 

Scilla latifolia at Barcelona Botanical Garden, note the previous inflorescences with aboundant seed capsules.