Citation: R. Br., Prod. Fl. Nov. Holl. 343 (1810) var. proceram.

Synonymy: Not Applicable

Common name: Water-ribbons.

Description:
Robust aquatic perennial; rhizome thick (c. 0.8 cm), bearing roots which end in tubers; leaves long (to 2 m), terete or flattened, 0.5-4 cm broad, sheathed at the base, without a ligule; the base somewhat fleshy, the upper blade erect or floating.

Scape stout, 20-50 cm long, bearing a terminal dense raceme of 60-100 flowers.

Fruit subglobular to broad-elliptic, 10-20 mm long; fertile carpels usually 6, erect or more or less spirally twisted, usually connate below the middle.

Published illustration: Sainty & Jacobs (1981) Waterplants of New South Wales, pp. 268, 269.

Distribution:  Grows in fresh water to 1.5 m deep. In swift-flowing streams the leaves float; in shallow still waters they are erect.   W.Aust. (southern part); Vic.; N.S.W. Conservation status: native Flowering time: Fruits: Aug. — April.

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

Biology: This variety shows great variation in leaf form; and the presence and degree of the twisting in the fruit. Variation may be partly due to environmental factors, but some aspects seem genetically controlled. Diploid, triploid and tetraploid races have been demonstrated. (Robb & Ladiges (1981) Aust. J. Bot. 29:639-651.)

Key to Infraspecific taxa:

1. Link to subspecies	subsp. dubium 1.
1. Link to subspecies	subsp. eleutherocarpum 2.

Author: Not yet available