Flowers at work with no card

During the week that my entire team was in town, I got these gorgeous flowers at work. They came without a card.
Who would spend so much and not want to be identified? Why? I was so surprised and happy to receive them... What I find intriguing is no one claimed them. I don't know who send them and the florist "cannot" tell me who purchased them.
It has been a couple of weeks now but I wish I could unfold the sender and thank whoever properly.
Funny :)