Lachnagrostis filiformis (G.Forst.) Trin.

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Tufted or shortly rhizomatous glabrous annual or perennial, culms erect, often geniculate at base, to 80 cm high. Leaf-blades flat or folded, to 25 cm long and 3.5 mm wide; ligules obtuse, soon becoming shredded, 2–8 mm long. Inflorescence a loose panicle, to 30 cm long, its base often enclosed by the upper leaf-sheath until maturity, branches often drooping, the culm typically breaking below the panicle at late maturity. Spikelets 2–4.5 mm long (excluding awn), usually pale green, but sometimes tinged purplish; glumes acute or acuminate, subequal or the lower slightly longer, keeled, scabrous along the keel; lemma 1.3–2 mm long, minutely 4-toothed at apex, variably covered with hairs, rarely almost glabrous, awned from near the middle; awn bent, exceeding spikelet by up to 4 mm; palea subequal to lemma; rachilla bristle plumose; anthers mostly 0.1–0.5 mm long. Flowers mainly Sep.–Jan.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MuF, MuM, MSB, NIS, OtP, OtR, RobP, SnM, Strz, VAlp, VRiv, VVP, WaP, WPro, Wim. Occurs across a wide variety of habitats but usually on poorly drained or seasonally wet sites; uncommon to rare at higher altitudes and very rarely recorded in the alps above the treeline.

The features used to distinguish Lachnagrostis aemula from L. filiformis show no sharp discontinuity, but when used collectively, they usually allow placement into one or other of the species. Occasional specimens appear to defy confident placement into either species; this suggests that a critical appraisal of these and other closely related taxa is required.

Lachnagrostis ×ripulae is a presumed hybrid between L. filiformis and L. rudis subsp. rudis.

Created by: Neville Walsh, 2015-04-24
Updated by: Val Stajsic, 2019-08-01
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Poaceae
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Lachnagrostis filiformis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Lachnagrostis filiformis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Scroll Belt present native
Robinvale Plains present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Strzelecki Ranges present native
Victorian Alps present native
Snowy Mountains present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales
Australian Capital Territory