This happened to me albeit I knocked over a full vase of lillys in my house.
A mixture of orange water everywhere on a wool mix loop pile.
I basically extracted then applied Ctrius Gel liberally. Left for ages then extracted again. I am not convinced it got it all out but blimey it certainly saved the wrath of the wife.
Also if you ever get the pollen on a carpet the best way to get it off is to gently apply sellotape to it to lift of the pollen bits. Don't try and brush it.