"In the field on controlling liquid movement on surfaces, super water-repellent surfaces have been well-documented. In contrast, comparatively fewer reports are available on the design of water pinning surfaces."
Photo details: Rose Petal, Umberto Salvagnin, 2008. This work is licensed under a Creative Commons Attribution 2.0 International Licences. http://commons.wikimedia.org/wiki/File:Rose_Petal.jpg