No pattern, but my mother made large fabric flowers years ago. She made the stems and outlined the petals and leaves using extra-long pipe cleaners (they call them something more politically correct now). She'd bend them into teardrop or heart shapes for each petal and cut the fabric to that shape, then I guess glue them together. I don't actually remember - I'm surprised I didn't pay more attention or that she didn't invite me to make them with her, but it was more her own thing.