Oplismenus aemulus

Oplismenus aemulus (R.Br.) Roem. &
Schult. Syst. Veg. 2: 487 (1817).

Classification. (GPWG 2001) : Subfamily
Panicoideae. Paniceae.

Basionym and/or
Replacement Name:
R. Br., Prodr. 194 (1810).

Type of Basionym or
Protologue Information
: HT: Brown 6132, Australia: Keppel Bay (BM).

Recent synonyms: O. aemulus var. lasiorhachis, O.

Key references
(books and floras):
[1810]. R.Brown, Prodromus (194 as Orthopogon
& O. flaccidus), [1878] G.Bentham, Flora
7 (492 as Oplismenus setarius), [1969] E.E.Henty, Manual
New Guinea (132), [2002] D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia
, [2008] S.W.L.Jacobs, R.D.B.Walley &
D.J.B.Wheeler, Grasses of New South Wales (308).

[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
, 4th edn (309).

Perennial. Culms prostrate, 300 cm tall. Ligule a fringed membrane, a ciliate
membrane. Leaf-blades ovate, 1–10 cm long, 4–18 mm wide. Leaf-blade surface
glabrous or indumented.

Inflorescence compound, a panicle of racemes. Racemes 3–9, 2.5–3.5 cm long.
Central inflorescence axis 3–15 cm long.

Spikelets sessile and pedicelled, 2 in the cluster. Fertile spikelets
2-flowered, the lower floret barren (rarely male), the upper fertile,
comprising 1 basal sterile florets, comprising 1 fertile floret(s), without
rachilla extension, lanceolate, laterally compressed, 3.5–4 mm long.

Glumes. Glumes
similar or dissimilar, thinner than fertile lemma. Lower glume ovate,
herbaceous, without keels, 5 -nerved. Lower glume surface indumented. Lower
glume apex awned. Upper glume ovate, herbaceous, without keels, 7 -nerved.
Upper glume surface indumented. Upper glume apex awned. Florets. Basal
sterile florets 1, barren, with palea. Lemma of lower sterile floret 100 % of
length of spikelet, membranous, without keels, 7 -nerved.

Fertile lemma 2–3 mm
long, without keel, 7 -nerved. Palea without keels.

: Australasia.

: Queensland, New South Wales, Victoria.

Cook, Burke, North Kennedy, South Kennedy, Port Curtis, Leichhardt, Burnett,
Wide Bay, Darling Downs, Moreton. New South Wales: North Coast, Central
Coast, South Coast, Central Tablelands, North-Western Slopes, and South-Western
Plains. Victoria: Gippsland Plain, East Gippsland.

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