Common Name: Bristly Starbur
Bristly Starbur is an upright annual plant growing 20 - 80cm tall[
The plant is sometimes harvested from the wild for use in traditional medicine[
S. America - Argentina north to Central America in Honduras and Nicaragua.
A weed of disturbed land, it is commonly found in cultivated upland crops, roadsides, pastures, waste areas, around corrals, and along railroads and cattle trails[
Succeeds in a wide range of climates from the temperate to the tropical zones[
Succeeds in a wide range of soils, preferring light soils but even succeeding in heavy clays[
The plant has become a weed in many areas of the tropics and subtropics[
]. Both the seeds and the leaves contain phenolic acids that are allelopathic to other plants. It is known to invade pastures and out-compete more desirable native species, it is also a weed of crops and a serious contaminant of wool[
]. A prolific seeder, the hooked hairs of the fruit attach easily to the coats of animals, and the fruit is widely distributed by this means[
]. The seeds also float and can be spread by floodwaters[
]. It is classified as a 'Noxious Weed' in some areas[
The plant is bitter and aromatic[
]. It is used in some parts of S. America as a diuretic and sudorific[
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