ASYSTASIA, CHINESE VIOLET (WEED)
Asystasia gangetica subsp. gangetica, Fam. Acanthaceae
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|
Opposite ovate to circular, about 50 x 40mm, base rounded, tapering or squared, margins roundly toothed. Leaf pairs connected by a transverse ridge.
|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 description:||More-or-less club shaped capsules, 13-28 x 2mm explosively expelling 4 flattened seeds when mature.|
|Food source for:|
|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.|