Very abundant are plants bearing pistillate flowers with three stigmas and three acicular staminodia.
St. John Harold 1964, 'Monograph of the Genus Elodea (Hydrocharitaceae): Part 2. The species found in theAndes and Western South America Monograph of the Genus Elodea (Hydrocharitaceae):Part 2. The species found in the Andes and Western South America', Caldasiahttp://www.revistas.unal.edu.co/index.php/cal/article/view/33141. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)