View Bidens Pilosa Weed Background. Spanish needle (bidens pilosa), an annual member of the asteraceae family, has long been called hairy beggarsticks (in the us). This is an important, herbaceous weed in tropical and subtropical regions which affects soybean.

Flora of Zimbabwe: Species information: individual images ... from www.zimbabweflora.co.zw

Radiata, may behave as a perennial. Seeds germinate on the soil surface or in shallow soil (to a depth of 1 cm). .bidens pilosa jstor plant science:

Erect annual herb, up to 6 ft tall.

Photo about bidens pilosa is the biennial plant and weeds.they have white colour. Threat of crossing with native bidens. Bidens pilosa mansfeld world database of agricultural and horticultural crops: Bidens pilosa is a species of flowering plant in the aster family.