Callitriche berteroana

Lansdown, Richard V. & Hassemer, Gustavo, 2021, The genus Callitriche (Plantaginaceae: Callitricheae) in South America, Phytotaxa 501 (1), pp. 85-118 : 114

18. Some fruit tYpicallY long-pedicellate (pedicel <6.2 mm long); wing uniformlY broad; bracts verY short (<1 mm long); filament <2.5 mm long............................................................................................................................................................... 3. C. berteroana

- Fruit subsessile; wing broad or narrow, typically broader at apex; bracts long (> 1.5 mm long); filament> 3 mm long................... ..........................................................................................................................................................................................................19