Sida retusa, common sida, Patty’s lucerne
Sida rhombifolia, Fam. Malvaceae
Perennial sub-shrubs, stems usually woody-based and strongly fibrous above. Erect robust, usually 0.3-1.1m tall. Young stems with fine star hairs becoming glabrous. Bark green and very strong.
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.
|Form or habit:||Shrub|
Alternate, simple. Irregularly rhomboidal to oblong, 15-80 x 5-40mm, upper surface dark green, paler below with short greyish star hairs; margins irregularly toothed towards the tip, more or less smooth towards the base; stipules threadlike.
Yellow, Cream, Orange
|Flower description:||Creamy to orange-yellow, 4-8mm long, mostly solitary on slender axillary stems 10-25mm long.|
|Fruit description:||Dry round brownish and radially separating into 1-seeded, wedge-shaped segments. 5-6mm in diameter, separating into 9-12 segments, 2-2.5mm long, apex acute with 2 points around 0.5-1mm long. Calyx 5-lobed, persistent, 5-6 mm long, minutely hairy; 10 ribbed at the base, lobes tapering to a point.|
|Food source for:|
|Toxicity:||No toxicity known|
|Origin:||Probably native of tropical America|
|Notes:||Spread by: segments spread by water, farm machinery, stock and in contaminated feed or seed. Bristly segments also adhere to clothing and animals. Invades/threats: pastures, open forests and disturbed areas along roadsides, headlands and stock camps. Notes: widespread throughout this region. Grows on all soil types but will not grow in areas with thick/long grass cover or in closed forests. Can flower and seed throughout the year in tropics. Environmental weed.|
|Information sources:||Mackay Regional Pest Management Group (2018) Weeds of the Mackay Whitsunday Region Second Edition.|