I've been doing some more work in my sketch book, I thought I would keep going while the creative drawing flow was with me. It might not last long!
This is my bleach drawing finished.

When it was finished I started looking at the shape rather than the seed head.

This is what I ended up with.

And then I decided to take it further and try to turn it into a design. I think it worked quite well.

Then I went one step further and it was obvious that it was one step too far. This really doesn't work because the design has just got lost.

So I went one step back and I think this works much better. I'm not sure about the yellow though.