Japanese Flowers and Symbolism

Hey Guys, Ive posted on here a few times, I run a shop out here in North Dakota. I have a request from a close friend to do a tattoo for herself and her children. She wants them to be different flowers that have different symbolic meanings. Naturally she wants the flowers meanings to be similar to herself/ her children. Ive looked around and found a few things, but I want to find a reliable source to get the info from. If any of you guys know where I can find different flowers and the meanings/ symbolism behind them, I would greatly appreciate it (web sites, or books). You guys are always a great help, and thanks for posting. Lefty