Scientific name: Callitriche platycarpa Kutz.
Common name: Various-leaved Water-starwort
Description
Habit: An aquatic or terrestial annual or perennial, variable.
Stems: Submerged, floating, creeping or terrestial.
Leaves: Opposite, undivided, oval, shortly stalked, terrestial leaves smaller than submerged; lower leaves narrower than upper; upper leaves forming a floating terminal rosette.
Flowers: Small, monoecious, submerged or on water surface, without perianth, axillary; male flowers with 1 stamen, 0.5-2 mm; female flowers with 4-celled ovary.
Fruits: A group of 4 1-seeded nutlets, orbicular, 1.6-1.8 mm, wider than long; lobes keeled and not winged; styles erect or spreading when terrestial; not forming if submerged.
Note: fruiting material is vital for identification.
Habitat: Rivers, streams and other wet places.
Distribution: Occasional.
Native status: Native
Of conservation interest: No