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Central QLD Coast Landcare Network

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Green amaranth

Amaranthus viridis, Fam. Amaranthaceae


An erect annual herb to 40cm. Stems are green or occasionally red. Previously Amaranthus gracilis.

Weed Category: Other invasive plants
Invasive plants that are not prohibited or restricted invasive plants, but are known to spread readily and cause negative impacts, within the region.
Weed: Yes
Form or habit: Herb
Family: Amaranthaceae
Leaf: Simple Alternate
Alternate lance-shaped to 150mm long, green to reddish-flushed; sometimes blunt to indented at the apex and tapering into a 7-70mm long leaf stalk
Flower conspicuous: Conspicuous
Flower colour:

Yellow, Green

Flower description: Small pale, densely clustered in elongated green to yellowish spikes.
Fruit conspicuous: Conspicuous
Fruit colour:

Black, Brown

Fruit: Dry
Fruit description: Small round wrinkled dehiscent fruit with lens-shaped black-brown seeds about 1mm across.
Habitat:
Distribution
Food source for:
Toxicity: Toxic or irritant to domestic pets
Origin: Tropical America
Notes: Spread by: probably the seeds in contaminated soil and by animals. Invades/threats: disturbed areas, summer crops, vegetables, cultivated land and gardens. Suspected to be toxic to poultry and stock. Spinach-like and edible when cooked. Environmental weed.
Information sources: Mackay Regional Pest Management Group (2018) Weeds of the Mackay Whitsunday Region Second Edition.

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