Eragrostis confertiflora

Eragrostis confertiflora J. M. Black. Trans.&
Proc. Roy. Soc. South Australia

55: 136 (1931).

Classification. (GPWG 2001) : Subfamily Chloridoideae.

Basionym and/or
Replacement Name:
var. densiflora J.M. Black, Trans. & Proc. Roy.
Soc. South Australia

48: 253 (1924).

Type of Basionym or
Protologue Information
: Toorawatchy Waterhole, between Cordillo Downs and
Innamincka, J.B. Cleland s.n..

Key references
(books and floras):
[1981] M.Lazarides in J.Jessop (ed)., Flora of
Central Australia
(459), [2002] D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia
, [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses
of South Australia

[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (367, fig. 295).

Habit. Annual
or ephemeral. Culms erect or decumbent, 16–40 cm tall, 1–2 -noded. Ligule a
fringed membrane or a fringe of hairs, a ciliolate membrane or a ciliate
membrane, 0.3–0.5 mm long. Leaf-blades straight, flat, 6–12 cm long, 1–3.3 mm

Inflorescence compound, a panicle. Panicle linear or lanceolate, 5–25 cm long,
0.5–1 cm wide.

Spikelets sessile or pedicelled. Fertile spikelets many flowered, with at least
2 fertile florets (5–10), comprising 5–10 fertile floret(s), with diminished
florets at the apex, linear or oblong, laterally compressed, 2–5 mm long.

Glumes. Glumes
similar. Lower glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper
glume lanceolate, 0.75 mm long, membranous, keeled, 1-keeled, 1 -nerved.

Fertile lemma 0.8–1.1 mm long, keeled, 3 -nerved. Lemma apex muticous.
Lodicules present. Anthers 2.

: Australasia.

: Western Australia, Northern Territory, South Australia,

Western Australia: Hall. Northern Territory: Darwin & Gulf, Barkly
Tableland, Central Australia North, Central Australia
South. South Australia: Lake Eyre. Queensland:
Burke, South Kennedy, Gregory North, Gregory South, Mitchell, Warrego.

Distinguishing characters include spiciform compact panicles long relative to
plant; membranous ligule; shiny turgid caryopsis; two stamens; 3-lobed palea with
almost smooth keels shorter than body and flaps; membranous-hyaline glumes,
lemmas and paleas; fragile rachilla cupular at apex of internodes. There are
many similarities with E. tenellula, its chief difference being its
spiciform (not open, decompound) panicle.

occurs on Gordon Downs Stn in W.A. just near the border, then throughout
central N.T. from about Katherine E into SW Qld and the far NE corner of S.A.
Black cracking clay grassland plains; seasonally wet swamps, and creek bed and
banks; red-brown loamy swales of sandhills; lateritic soils.; flowers
Apr.-Sept.; fruits Apr.-Sept.

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