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ASYSTASIA, CHINESE VIOLET

(Asystasia gangetica subsp. gangetica, fam. Acanthaceae)

Asystasia gangetica subsp. gangetica Asystasia gangetica subsp. gangetica Asystasia gangetica subsp. gangetica Asystasia gangetica subsp. gangetica Asystasia gangetica subsp. gangetica
Upright spreading perennial herb to 60cm tall or to 1m if it has support. Stems root at nodes wherever they touch the ground.
Form or habit: Herb
Latex:Absent
Leaf:Simple Opposite

Opposite ovate to circular, about 50 x 40mm, base rounded, tapering or squared, margins roundly toothed. Leaf pairs connected by a transverse ridge.

Flower conspicuous: Conspicuous
Flower colour: Cream, pale mauve to purple
Flower description:Irregularly, 5-lobed bell-shaped, 20-40mm long, colours vary from pale mauve to purple.
Fruit conspicuous: Conspicuous
Fruit colour: Brown
Fruit: Dry
Fruit description: More-or-less club shaped capsules, 13-28 x 2mm explosively expelling 4 flattened seeds when mature.
Habitat:
Distribution:
Food source for:
Toxicity:
Origin:Probably Asia
Weed:Yes
Weed status:Environmental/garden escapee
Notes:Spread by: Explosive seeds, vegetatively from stems, garden waste.
Invades/threats: Can smother other ground plants and displace vegetation, mainly within coastal sandy soils but can tolerate a wide range of soils.
Notes: Garden escapee. Large infestation recorded at Turners Beach, extending from just above the high tide line.
Weed Alert: This plant is on the National Environmental Alert list.
A. gangetica spp. micrantha that has smaller white flowers, up to 25mm long, with purple marking on lower lip. Not recorded in this region.
Information sources: Mackay Regional Pest Management Group (2011) Weeds of the Mackay Whitsunday Region.
Weeds Australia: http://www.weeds.org.au/

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