This pattern is hard because it requires the folder to extrapolate directions for one corner and repeat those folds (without directions) on the other three corners.
This fold is a little different from most instead of a single large folded piece of paper, it requires the combination of several small (and identical) folds.
You can also experiment with multi-colored poppies by folding two different colored pieces of paper together, then cutting the tip of one layer off to reveal the second color underneath.
The trillium is nearly identical to the monja blanca, the only difference being that two monja blancas are combined to produce the trillium.
This fold is particularly effective when two different colors are used.
The monja blanca (old white nun) is the national flower of Guatemala. (I have taken liberties with the coloration.) It requires a triangular starting shape, which may either be printed and cut out from the instructional sheet below, or folded and cut using the triangle base.
Perhaps my favorite thing about this particular fold is the amount of experimentation that can be done to produce slightly different results. Of course, every fold pattern can be experimented with, but this one in particular is conducive to many such experiments. For example, on this one I folded the tips down to give the petals a rounder tip.
And on this one I folded the tip at the center of the flower down to create a star.
Here's the same thing, but with a much bigger center star.
And this one actually has three stars in the center (although the middle one is so small that it's more of a nub than a star).
Here's a ... less than aesthetically pleasing version, worth showing to illustrate that two pieces of origami paper can be folded together to produce a multi-patterned flower box.
And here's a slightly more elegant looking product, but since it's a single sheet of paper, notice that only part is colored while the other part is blank white.
My 8 March 2013 blog about origami prompted me to launch a second blog, one dedicated solely to origami. This way, as I complete instructional sheets, I can post them directly to this blog and it will not interfere with my Beatles blog.