Glyceria drummondii, also known as Nangetty Grass, is listed as Endangered under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) and as Declared Rare Flora under the Wildlife Conservation Act 1950.
The main identified threats to Nangetty Grass are drought, changed hydrology and roadworks. This species is susceptible to drought and does not grow during these periods. Roadworks have affected one population as clearing has occurred at this site.
Glyceria drummondii is an erect, hairless grass with creeping stems that root at the nodes. Leaves are flat, rough on the upper surface and have an oblong ligule. Flowers are narrow, and form a loose cluster with stiff branches.
Each branch bears one to four ‘spikelets’. The inter-nodes between the flowering glume (bract at the base of the grass spikelet) can be up to 1 mm long and the upper glume is up to 2.5 mm long.
The lemmas (outer bracts) taper upwards and the paleae (bracts enclosing the flower) have rough keels to 9 mm long. Flowering occurs from September to October.
Nangetty Grass is endemic to Western Australia and is known from two populations north of Mingenew, occurring approximately 17 km apart. Insufficient data are available to determine area of occupancy. One population occurs on private land and the other on a road verge. This species may be in decline as surveys conducted in 2004 failed to record plants at the known sites. In 2000, the population on private property had 100 plants and the population on a road verge had 200 plants.
Nangetty Grass grows in seasonally flooded, localised hollows of clay pans and clay plains. It grows on brown clay in shrubland with Maireana pyramidata, Atriplex bunburyana and Marsilea sp.
Information Source: Government of Australia, Department of Environment and Department of Parks and Wildlife Western Australia.