From Tree Heals Go Woosh:

Cataclysm has brought several new spells into all of our spellbooks and has given each class of healer some new tools for group healing.  Unfortunately, many of these spells display as visual effects on the ground, which can make things a little complicated.  (As pro raiders, I know that none of us ever stands in fire, so retraining yourself to actually run into ground effects may feel a little backwards at first.)

To help, I’ve taken some screenshots to show you what each of the AoE healing spells looks like.