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Central QLD Coast Landcare Network

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ASTHMA PLANT (WEED)

Chamaesyce hirta prev. Euphorbia hirta, Fam. Euphorbiaceae


Annual sprawling to more-or-less erect, branching herb, stems 2-40cm with milky sap, closely pressed short curled hairs and long spreading yellowish hairs.

Form or habit: Herb
Latex: Euphorbiaceae
Leaf: Simple Opposite
Opposite simple ovate, 49 x 24mm, hairy, often brownish-green, margins serrated.
Flower conspicuous: Inconspicuous
Flower colour: Green
Flower description: Tiny greenish, borne in tight clusters between the upper pairs of leaves.
Fruit conspicuous: Inconspicuous
Fruit colour:
Fruit: Dry
Fruit description: Hairy capsules, 1.5 x 1.5mm, separating into three 2-valved segments. Seeds oval with square base 0.8mm long, with or without regular crosswise wrinkles.
Habitat:
Distribution
Food source for:
Toxicity: No toxicity known
Origin: Central America
Weed: Yes
Weed status: Environmental/garden escapee
Notes: Spread by: Seeds in contaminated soil, garden waste. Invades: Colonises any bare areas in full sun - headlands, creek banks, roadsides and gardens. Environmental weed.
Information sources: Mackay Regional Pest Management Group (2011) Weeds of the Mackay Whitsunday Region.

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