Urochloa gilesii var. notochthona (Domin) B.K.Simon. Austrobaileya 9: 216 (2010).
Classification.
(GPWG 2001) : Subfamily Panicoideae. Paniceae.
Basionym and/or
Replacement Name: Panicum
notochthonum Domin, Repert. Spec. Nov. Regni Veg. 10: 60 (1911).
Type of Basionym or
Protologue Information: HT: Dallachy s.n., Australia: Darling River
(PR).
Recent synonyms:
Brachiaria notochthona, Urochloa notochthona.
Key references
(books and floras): [1981] M.Lazarides in J.Jessop (ed)., Flora of
Central Australia (475 as Brachiaria), [2002] D.Sharp &
B.K.Simon, AusGrass, Grasses of Australia (as Brachiaria), [2006]
J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia (428 as Brachiaria),
[2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses of New South
Wales (395).
Illustrations:
[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia (428, fig. 358 as Brachiaria), [2008]
S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales,
4th edn (395).
Habit. Annual.
Culms decumbent, 12–20 cm tall. Lateral branches simple. Ligule a fringe of
hairs. Leaf-blades lanceolate, 2–5 cm long, 3–7 mm wide.
Inflorescence.
Inflorescence compound, a panicle of racemes. Racemes 2–5, 1–3 cm long, 2–3 mm
wide. Central inflorescence axis 1–2 cm long.
Spikelets.
Spikelets pedicelled. 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, 4–4.8 mm long.
Glumes. Glumes
dissimilar, thinner than fertile lemma. Lower glume oblate, membranous, without
keels. Upper glume ovate, membranous, without keels, 7–9 -nerved. Florets.
Basal sterile florets 1, barren, with palea. Lemma of lower sterile floret 100
% of length of spikelet, membranous, 7 -nerved.
Fertile lemma 2.2 mm
long, without keel. Lemma apex mucronate or awned, 1 -awned. Median (principal)
awn 0.75–1 mm long overall. Palea without keels.
Continental
Distribution: Australasia.
Australian
Distribution: Northern Territory, South Australia, Queensland,
New South Wales.
Northern
Territory: Central Australia North, Central
Australia South. South Australia:
Lake Eyre, Eyre Peninsula, Murray, Yorke Peninsula, Southern Lofty. Queensland: Maranoa, Warrego, Gregory
South. New South Wales:
North-Western Plains, North Far Western Plains.
