okay, this suggestion is based on the assumption that you see her multiple times throughout the day with breaks in between...
you could give her a single flower each time you see her throughout the day and with the last flower give her the picture with a poem... or even better, an invitation to go on a date sometime. you'll know if the invite is a bad idea or not based on her reactions throughout the day... that way you can play things by ear and decide just how forward you want to be.