Lachnagrostis palustris A.J.Br.

Muelleria 26 (2): 39 (2008) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: rare (r)

Tufted, glabrous, perennial, 25–80 cm tall including inflorescences; culms erect but often strongly geniculate, sometimes branched; nodes mostly enclosed or just exserted beyond the leaf sheath; lower leaf sheaths usually strongly purpled. Leaf blades erect, smooth to scaberulous, generally involute when young but flattening with age, 5–15(–20) cm long and 0.2–1.5 mm wide; ligule membranous, acute, becoming lacerate, (4–)6–8 mm long. Inflorescence an open panicle, 10–35 cm long from the lowest whorl, exserted at maturity with erect, divaricate to spreading, primary branches to 8 cm long but often less than 5 cm long. Spikelets (3.2–)3.4–3.7(–4.0) mm long, strong purple but fading with age to pale golden-brown; glumes acuminate, unequal, the lower 0.2–0.4 mm longer, keels scabrous, lateral surfaces smooth to finely papillose, margins without or with a few scattered cilia; lemma acute, 1.5–1.8 mm long, minutely 4–toothed at the apex or sometimes the lateral nerves extended into short setae (0.5–0.7 mm), covered in 0.3–0.5 mm long hairs, callus with hairs 0.5–0.7 mm long; awn inserted at near the mid-dorsal region of the lemma, (4.3–)5.0–6.0(–6.5) mm long, strongly geniculate, the bristle 1.5–2.0 times as long as the column; palea 1.2–1.6 mm long; rachilla extension plumose, 1.2–1.6 mm long including hairs; anthers 0.4–0.5(–0.6) mm long. Flowers/fruits Nov.–Feb.

Glep, GGr. Occurs in and around freshwater swamps and marshes in the far south-west of the State (e.g. Dergholm, Casterton areas) and south-west of the Grampians near Glenisla.

Usually in wetter parts of its swampy habitat. The strongly purpled lower leaf sheaths are characteristic.

Created by: Neville Walsh, 2015-04-24
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 palustris in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Lachnagrostis palustris in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Greater Grampians present native

State distribution

Distribution map
South Australia