This one in Portuguese - my translation left something to be desired, but the pictures are fairly self explanatory. Direct link to pictorial ~ crochet petal edging. Beautiful, but wouldn't want to have to cover a vast area with this stitch.
The puff or bobble crochet stitch is as simple as single and double crochet. This stitch that will provide amazing texture to your hooked bits! -- I think I might try this as a border on a granny square blanket to add a bit of texture.