Urochloa distachya

Urochloa distachya (L.) Nguyen. Novit.
Syst. Pl.
Vasc., Acad. Sci. URSS,
1966, 13 (1966).

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

Basionym and/or
Replacement Name:
L., Mant. Pl. 2: 183–184 (1771).

Type of Basionym or
Protologue Information
: HT: Koenig s.n., India (LINN-80.41; IT:

Recent synonyms:
Brachiaria distachya.

Key references
(books and floras):
[1878] G.Bentham, Flora Australiensis 7 (478 as Panicum
), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
(as Brachiaria).

Habit. Annual
or perennial. Stolons present. Culms prostrate, 5–20 cm tall. Mid-culm
internodes pubescent. Mid-culm nodes glabrous or pubescent. Ligule a fringe of hairs.
Leaf-blades linear or lanceolate, 1.8–12 cm long, 3–9 mm wide. Leaf-blade
surface glabrous or indumented.

Inflorescence compound, a panicle of racemes. Racemes 2–3, 1–3.5 cm long, 2–2.5
mm wide. Central inflorescence axis 0.15–2 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, elliptic, dorsally
compressed, 2.4–3.7 mm long. Rhachilla internodes elongated between glumes.

Glumes. Glumes
dissimilar, thinner than fertile lemma. Lower glume ovate, membranous, without
keels, 5–9 -nerved. Upper glume oblong, 3–3.5 mm long, membranous, without
keels, 5–7 -nerved. Upper glume surface glabrous. Upper glume apex muticous. Florets.
Basal sterile florets 1, barren, with palea or without significant palea. Lemma
of lower sterile floret 100 % of length of spikelet, membranous, 5 -nerved.
Fertile florets bisexual.

Fertile lemma 2–2.8 mm
long, without keel. Lemma apex muticous. Palea without keels.

: Africa, Tropical Asia, Australasia, and Pacific.

: Northern Territory, Queensland.

Northern Territory:
Darwin & Gulf. Queensland: Cook, North Kennedy, South Kennedy, Port
Curtis, Moreton, Mitchell.

Native; N.T. and Qld. Flowers Jan.-Aug.

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