Widgeonweed Family - Photo (c) judith holm, some rights reserved (CC BY-NC-ND), uploaded by judith holm Comprehensive check list for Widgeonweed Family (Family Ruppiaceae)
Source: Calflora: Information on California plants for education, research and conservation. [web application]. 2012. Berkeley, California: The Calflora Database [a non-profit organization]. Available: http://www.calflora.org/ (Accessed: 45 07, 2012). (Link)