Urochloa gilesii (Benth.) D.K.Hughes. Kew
Bull. 1923, 319 (1923).
Classification. (GPWG 2001) : Subfamily
Replacement Name: Panicum gilesii
Benth., Fl. Austral. 7: 477 (1878).
Type of Basionym or
Protologue Information: HT: Giles s.n., Australia: Northern
Territory: Charlotte Waters (K).
(books and floras):  G.Bentham, Flora Australiensis 7 (477 as Panicum
gilesii),  M.Lazarides in J.Jessop (ed)., Flora of Central
Australia (475 as Brachiaria),  D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia (as Brachiaria),  J.Jessop,
G.R.M.Dashorst, F.M.James, Grasses of South Australia (427 as Brachiaria),
 S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses of New South
 J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia (428, fig. 357 as Brachiaria), 
S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales,
4th edn (395).
Rhizomes absent. Stolons absent. Culms decumbent, 15–40 cm tall, 3–5 -noded.
Mid-culm internodes glabrous. Mid-culm nodes pubescent or bearded. Leaf-sheaths
hairy. Ligule a fringed membrane or a fringe of hairs, a ciliate membrane.
Leaf-blades lanceolate, 2–10 cm long, 3–13 mm wide. Leaf-blade surface glabrous
Inflorescence compound, a panicle of racemes. Racemes 3–5, 1.5–4 cm long, 3–6
mm wide. Central inflorescence axis 1–4 cm long.
Spikelets sessile. 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, ovate, dorsally
compressed, 2.3–5 mm long. Rhachilla internodes brief up to lowest fertile
dissimilar, thinner than fertile lemma. Lower glume ovate, hyaline, without
keels, 0–1(–3) -nerved. Upper glume ovate, 2.3–4.9 mm long, membranous, without
keels, 7–9 -nerved. Upper glume surface glabrous or indumented. Upper glume
apex muticous or mucronate. Florets. Basal sterile florets 1, male or
barren, with palea. Lemma of lower sterile floret 100 % of length of spikelet,
membranous, 7 -nerved.
Fertile lemma 2–2.5 mm
long, without keel. Lemma apex mucronate or awned. Median (principal) awn 0.5
mm long overall. Palea without keels.
Distribution: Northern Territory, South Australia, Queensland, New South
Darwin & Gulf, Central Australia North, Central Australia South. South
Australia: North-western, Lake Eyre, Eastern. Queensland: Burke,
Darling Downs, Leichhardt, Maranoa, Mitchell, North Kennedy, Port Curtis, South
Kennedy, Warrego, Moreton, Gregory North, Gregory South. New South Wales:
North-Western Plains, North Far Western Plains.
Endemic. Central and
eastern Australia, particularly in arid regions; not as yet recorded from W.A.
Brigalow forests, tropical and subtropical subhumid woodlands, semi-arid shrub
woodlands, shrub steppe shrublands, Acacia
shrublands, arid tussock grasslands, and arid hummock grasslands. Flowering
mostly Dec. to May.