Hugo J de Boer, Hanno Schaefer, Mats Thulin and Susanne S Renner (2012) Evolution and loss of long-fringed petals: a case study using a dated phylogeny of the snake gourds, Trichosanthes (Cucurbitaceae). BMC Evolutionary Biology 2012 12:108 DOI: 10.1186/1471-2148-12-108 http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-12-108
