Stack stack stack.
Petal towers with sepal steeples.
This is a bundle of stems. I made the first one with just brown, then switched to green and brown. A big improvement. Two laces, each 1/8" wide (square actually, 1/8" wide by 1/8" thick) and six feet long for each stem.
Now, let's make a rose. Start by crossing one green and one brown lace at the center.