horseweed, hairy

COMMON NAME: Horseweed, hairy
SCIENTIFIC NAME: Conyza bonariensis
FAMILY: Asteraceae
LIFECYCLE: Annual
FEATURES: Low growing annual herb commonly 15 to 30 cm in height. Stems hairy. Leaves linear to lanceolate,
alternate without distinct petiole seeming to clasp or attach directly to stem. Inflorescence born in
leaf axils. Inflorescence spherical, fuzzy in appearance due to pappi of each individual flower. Seed
slender, elongated, and easily wind dispersed.
DESCRIPTION: Common summer annual weed in turfgrass, ornamentals, and non-crop areas. Especially common in
drought years or in dry, poor soil areas. Not common in areas that are frequently mown. Similar to
common horseweed (Conyza canadensis) but hairy horseweed is much shorter and more pubescent.

Broad View Whole plant

Broad View
Whole plant

Flower / Seed Head Inflorescence

Flower / Seed Head
Inflorescence

Leaf Stem and leaves

Leaf
Stem and leaves