Urochloa advena*

Urochloa advena* (Vick.) R.D. Webster.
Australian Paniceae (Poac.): 231: (1987).

(GPWG 2001) : Subfamily Panicoideae. Paniceae.

Basionym and/or
Replacement Name:
Vickery, Contr. New South Wales Natl. Herb. 1(6): 329–330
(1950) [1951].

Type of Basionym or
Protologue Information
: HT: A. Noble s.n., Australia: Glen Innes

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
(as Brachiaria), [2008] S.W.L.Jacobs, R.D.B.Walley &
D.J.B.Wheeler, Grasses of New South Wales (394).

Habit. Annual.
Rhizomes absent. Stolons absent or present. Culms erect or geniculately
ascending or decumbent, stature slender to delicate, 20–120 cm tall, 3–5
-noded. Mid-culm internodes glabrous. Mid-culm nodes pubescent. Lateral
branches sparsely branched. Leaf-sheaths glabrous on surface. Ligule a fringe
of hairs, 0.6–1 mm long. Leaf-blades linear or lanceolate, 3–15 cm long, 2–5.5
mm wide. Leaf-blade surface glabrous.

Inflorescence compound, a panicle of racemes. Racemes 3–6, 1.1–2.8 cm long, 2–5
mm wide. Central inflorescence axis 1–8 cm long.

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, oblong, dorsally
compressed, 3–3.5 mm long.

Glumes dissimilar, thinner than fertile lemma. Lower glume ovate, membranous,
without keels, 0–1 -nerved. Lower glume surface glabrous. Upper glume oblong,
1.9–3.4 mm long, membranous, without keels, 5–7 -nerved. Upper glume surface
indumented. Upper glume apex muticous. Florets. Basal sterile florets 1,
barren, without significant palea. Lemma of lower sterile floret 100 % of
length of spikelet, membranous, 3–5 -nerved. Fertile florets bisexual.

Fertile lemma 2.25–3.2
mm long, without keel, 3 -nerved. Lemma apex muticous. Palea without keels.

: Africa and Australasia.

: Queensland, New South Wales.

Darling Downs. New South Wales: Northern Tablelands, North-Western

Notes. In
tropical and subtropical wet sclerophyll forests and dry sclerophyll forests.
Flowers Jan.-Apr.

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