"Flowers are - well, there's two major kinds, blue and green, speakflowers and knowflowers. Speakflowers are where you talk to people and keep personal petals, knowflowers are where you keep knowledge. If you're picking up a 'mancy, or something else - woodworking or geography or music or whatever - you use the knowflowers, and if you make an advance you put that information back into the network."