Scientific name: Callitriche obtusangula Le Gall
Common name: Blunt-fruited Water-starwort
Description
Habit: An aquatic or terrestial perennial, variable.
Stems: Submerged, floating or terrestial.
Leaves: Opposite, undivided; submerged leaves linear, deeply notched at the tip; upper leaves oval and forming terminal rosette.
Flowers: Small, monoecious, without perianth, axillary; male flowers with 1 stamen; female flowers with 4-celled ovary.
Fruits: A group of 4 1-seeded nutlets, 1.5 mm, longer than wide; without wing or keel on the lobes; styles erect; not forming if submerged.
Note: fruiting material is vital for identification.
Habitat: Calcareous rivers and turloughs.
Distribution: Local and rare.
Native status: Native
Of conservation interest: No