Appearance
It is a tall plant, growing up to 1 metre in height, with creeping rhizomes and erect, triangular stems, each terminating in an inflorescence. The species grows in shallow water or on damp ground, such as at pond edges.
Distribution
The holotype was collected in Italy. It is a widespread species found across Africa, southern Europe, the Indian subcontinent and western Asia. It incidentally occurs in Wallonia as a native. It is also found in western France, south Wales and southern England, where it may or not originally be native. It has recently spread northwards to Flanders and the Netherlands where it occurs in scattered adventive populations. It has also been introduced to Tristan da Cunha and Western Australia.References:
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