Dinebra panicea* (Retz.) P.M.Peterson & N.Snow, Ann. Bot. 109: 1326 (2012).
Classification. (GPWG 2001) : Subfamily
Chloridoideae. Cynodonteae.
Basionym and/or
Replacement Name: Poa panicea
Retz., Observ. Bot. 3: 11 (1783).
Type of Basionym or
Protologue Information: China:
E China, Honoratiss. Bladh. (HT: LD).
Recent synonyms:
L. mucronata, L. filiformis (syns. of var. brachiata).
Key references
(books and floras): [1969] E.E.Henty, Manual Grasses New Guinea
(121), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia. as Leptochloa.
Habit. Annual.
Culms decumbent, stature slender to delicate, 30–120 cm tall. Leaf-sheaths
hairy. Ligule an eciliate membrane or a fringed membrane, a ciliate membrane,
1–2.5 mm long, lacerate. Leaf-blades flat, 3–26(–35) cm long, 1–14 mm wide.
Leaf-blade surface indumented.
Inflorescence.
Inflorescence compound, a panicle of racemes. Racemes numerous, 60–70,
spreading or erect, flexuous, (2–)3–8(–16) cm long. Central inflorescence axis
8–35 cm long.
Spikelets.
Spikelets sessile. Fertile spikelets many flowered, with at least 2 fertile
florets (2–4), comprising 2–4 fertile floret(s), with diminished florets at the
apex, obovate, laterally compressed, 1.5–3.2 mm long.
Glumes. Glumes
dissimilar. Lower glume linear or lanceolate, membranous, keeled, 1-keeled, 1
-nerved. Upper glume linear or lanceolate, 1.5–1.8 mm long, membranous, keeled,
1-keeled, 1 -nerved. Upper glume apex muticous or mucronate.
Florets.
Fertile lemma 1–1.5 mm long, without keel or keeled, 3 -nerved. Lemma surface
glabrous or indumented. Lemma apex entire, muticous. Palea 2 -nerved. Grain
0.7–0.8 mm long.
Continental
Distribution: Africa, Australasia, North America, and South
America.
Australian
Distribution: Queensland.
Queensland:
Burke, North Kennedy, Wide Bay, Darling Downs,
Moreton.
Notes.
Diagnostic characters include the long panicle relative to the plant itself,
thin papery hairy blades and sheaths, prominent ligule, subequal glumes long
relative to the spikelet, pubescent lemma and palea, and trigonous grooved grain.
Introduced;
coastal districts and inland areas of NW Qld; native in America in warm-temperate and tropical regions;
introduced to western Africa. A weed of
disturbed places, usually within pastures and crops such as sorghum and sugar-cane.
Infra-specific
taxa:
Lower lemma mostly
more than 1.2mm long D. panicea subsp. brachiata
Lower lemma mostly less than 1.2mm long D. panicea subsp. panicea
