Elements of this image would be great converted to a line drawing for a tattoo
Another one of my favorite taken by Ansel Adams.
lily tattoo sketch | Vector illustration of lily in black and white colors. - stock vector
Black and White Rose pencil sketch. Josh Beatson
Google Image Result for http://kiroset.shikshik.org/_cacheimg/o/r/orchid%2520sketch.jpg
Irises botanical drawing original black and white pen and ink detailed
Pencil drawing rose with shading. This image is more order as the flower has it petals but there could be signs of disorder which would be the thorns. This fits in with the theme of nature.