Burweed

Triumfetta semitriloba is a perennial subshrub or shrub in the Malvaceae family, typically reaching 1 to 3 metres in height. Stems are erect, branched, and covered in fine stellate hairs that give the foliage a softly tomentose feel. Leaves are alternate, ovate to broadly three-lobed (hence the epithet semitriloba), with serrate margins, palmate venation, and petioles 2 to 5 centimetres long. Small yellow flowers, around 6 to 10 millimetres across, appear in short axillary cymes; each has five petals, five sepals, and numerous stamens. The fruit is a small globose burr, 4 to 8 millimetres in diameter, densely armed with hooked bristles that catch readily on fur and clothing, aiding seed dispersal. Native to tropical and subtropical regions of the Americas, it grows on disturbed ground, roadsides, and forest margins from sea level up to mid elevations.