''Gonocarpus montanus'' is a
shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...
in the watermilfoil family
Haloragaceae native to eastern Australia and New Zealand.
Common names include mountain raspwort.
References
Flora of Victoria (state)
Flora of New South Wales
montanus
Plants described in 1847
{{Saxifragales-stub