I found this plant!
Quaking Grass
(Weed)
Briza maxima

Quaking Grass is a short-lived tufted grass with upright stems growing 10-65 cm tall. The seed-head is a distinctive drooping open panicle with 3-12 large flower spikelets.

Able to invade most vegetation types this species can form dense swards and outcompete native species.

A native to northern Africa, southern Europe and western Asia, this species is common in the Surf Coast region.

Photos courtesy of Neil Tucker.

Plant form
Grass-like: spreading
Flowering season
Spring, Summer
Flower colour
Green
Leaf colour
Light Green
Both sides of the leaf are one colour
Leaf shape
Linear
Leaf edge
Entire