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Water Couch

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Water Couch Photos

Scientific Name: Paspalum distichum
Water Couch forming a dominant ground-cover mat
Water Couch forming a dominant ground-cover mat
Photo: A J Brown

Status:
Native to many tropical and warm-temperate countries. Unknown status in Australia but may consist of both native and naturalised elements.

Plant Description:
Semi-aquatic, perennial grass with long rhizomes and stolons. Stems erect or ascending to 60 cm tall. Stem nodes (swollen growing points) often hairy. Leaves acutely to sharply pointed, blades flat to 20 cm long and 7 mm wide, hairless but ciliate along margins of blades and sheaths.

Flower-heads of two terminal racemes of 2-6 cm long. Spikelets in two rows, elliptic in shape, 2.5-3.5 mm long, finely hairy.

Habitat:
Common in or near fresh water, such as river banks, marshes, swamps, depressions, drains and wet cultivated land. May tolerate some brackishness.

Comments:
Along with Paspalum (P. dilatatum), Water Couch is usually indicative of freshwater environments, unlike Salt Couch (Sporobolus virginicus) which grows under saline conditions

Water Couch Photos

Water Couch growing in fresh water
Water Couch growing in fresh water
Photo: A J Brown
Leaves of Water Couch
Leaves of Water Couch
Photo: A J Brown

Flowering Water Couch
Flowering Water Couch
Photo: A J Brown

Flowering racemes of Water Couch
Flowering racemes of Water Couch
Photo: A J Brown

Water Couch spikelets with exserted anthers and stigmas
Water Couch spikelets with exserted anthers and stigmas
Photo: A J Brown
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