Native to temperate South America. Perennial. C4.
Family. Poaceae (Grass family).
Other names: Setaria gracilis.
Slender Pigeon-grass is uncommon. It is an occasional street weed.
The flowers are clustered into a cylindrical cluster (a condensed panicle) which is about 5mm wide. The lemmas have a pointed tip. Bristles rise from the base of the spikelets. The bristles have have barbs which point upwards i.e. the reverse of barbs on a spear.
Setaria: from seta, a bristle; gracilis slender, gracile.
1: A Castlemaine street weed. Berkely St. 2: The flower cluster is dense and about 5mm across. 3: The bristles remain when the spikelets are shed. Dried specimen. Castlemaine.