Citation: F. Muell., Fragm. Phyt. Aust. 9:166 (1875).

Synonymy: Not Applicable

Common name: Large mudwort.

Description:
Semi-aquatic ?perennial with closed-packed radical leaves, flowers and fruits owing to many short, rarely long, stolons; leaves 1.5-16 cm long, spreading when exposed, with the blade floating on water's surface when submerged, elliptic or broadly so, 5-26 x 1.5-10.5 mm, cuneate to rounded at the base, obtuse to rounded at the apex.

Pedicels variable in length, in fruit 0.2-8 mm long; calyx 2-3.2 mm long, without a purple patch below each sinus; corolla white; anthers black or white partly flushed with grey, with white pollen.

Capsules broad-ellipsoid, rarely globular, 2.2-4 x 1.7-3 mm, dark-brown, with erect caducous style 0.3-0.8 mm long; seeds oblong, 0.5-0.75 mm long, dark-brown.

	Habit.
Image source: fig. 583B in Jessop J.P. & Toelken H.R. (Ed.) 1986. Flora of South Australia (4th edn).

Published illustration: Cunningham et al. (1982) Plants of western New South Wales, p. 598.

Distribution:  In clay or fine silt, on margins of rivers, streams or freshwater swamps, or in ephemeral rock pools.   ?W.Aust.; Qld; N.S.W.; Vic.   New Zealand. Conservation status: native Flowering time: April — Nov.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: Variation from sessile to pedicellate flower occurs within sporadic populations throughout S.Aust.

Author: Not yet available