Lachnagrostis lacunarum

Lachnagrostis lacunarum, (D.I.Morris)S.W.L.Jacobs. as 'lacunis' Telopea
9:446(2001). Classification. (GPWG 2001) : Subfamily Pooideae.
Tribe Poeae.

Basionym and/or
Replacement Name:
 Agrostis lacunis
D.I. Morris, Muelleria 7(2): 149, 151–153, f. 4, 5a (1989).

Type of Basionym or
Protologue Information
: Australia: Tasmania: Twisted Tarn, Mt Field
National Park, 1110 m, aquatic, shallow water with mud bottom; 1 Mar 1983, A.M.
Buchanan 1187
(HT: HO-93290; IT: AD, CANB, CHR, MEL, NSW).

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
[2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2

Habit. Annual
or perennial. Culms erect or geniculately ascending, 20–40 cm tall. Ligule an
eciliate membrane, 3–6 mm long, acute. Leaf-blades linear, flat, 10–20 cm long,
1.5–2.5 mm wide. Leaf-blade surface scaberulous.

Inflorescence compound, a panicle. Panicle pyramidal, 6–12 cm long, 4–7 cm wide.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), with a barren rachilla extension, lanceolate, laterally compressed,
(2.5–)2.75–4 mm long.

Glumes. Glumes
similar, firmer than fertile lemma. Lower glume lanceolate or elliptic,
membranous, keeled, 1-keeled, 1 -nerved. Upper glume lanceolate or elliptic,
2.75–4 mm long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume surface

Fertile lemma (1.5–)2–2.5 mm long, without keel, 5 -nerved. Lemma surface
indumented. Lemma apex dentate, awned. Median (principal) awn dorsal, 1.5–3.25
mm long overall, with a straight or slightly twisted column. Column 1.5 mm
long. Palea present, 2 -nerved. Lodicules present. Anthers 3.

: Australasia.

: Tasmania.

Central Highlands, Mt Field.

Notes. Endemic. Restricted
to the Central Highlands and Mt Field, Tas. at
altitudes of 850–1250 m. At the edge of tarns and lakes in highland areas.

AVH 2011

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith