Aristida lignosa


Aristida lignosa B.K.Simon. Austrobaileya
2: 94 (1984).

Classification. (GPWG 2001) : Subfamily
Aristidoideae. Aristideae.

Type of Basionym or
Protologue Information
: Queensland:
South Kennedy District: Hazelwood Creek, W. of Eungella Dam, 9 April
1978, Simon 3339 (HT: BRI-264061; IT: CANB, K).

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
Australia
,
[2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses of New South
Wales
(130).

Illustrations:
[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
Wales
, 4th edn (130).

Derivation: L. lignum;
wood; -osa, abundance. Culms woody.

Habit.
Perennial. Culms erect, stature robust to moderate, 100–200 cm tall, 3–4
-noded. Mid-culm internodes glabrous. Lateral branches branched. Ligule a
fringe of hairs, 0.2 mm long. Leaf-blades straight, flat or conduplicate or
involute or convolute, 15–30 cm long, 2–4 mm wide.

Inflorescence.
Inflorescence compound, a panicle or a panicle. Panicle linear or lanceolate,
7–30 cm long, 0.5–5 cm wide.

Spikelets.
Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 7–11 mm long.

Glumes.
Glumes similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
keeled, 1-keeled, 1 -nerved. Lower glume surface glabrous. Upper glume
lanceolate, 7–10 mm long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume surface
asperulous or scabrous, glabrous. Upper glume apex entire, muticous.

Florets.
Fertile lemma 6–11 mm long, without keel, 3 -nerved. Lemma apex awned, 3
-awned. Median (principal) awn without a column. Lateral lemma awns present.
Palea without keels. Anthers 3. Grain 6 mm long.

Continental
Distribution
: Australasia.

Australian
Distribution
: Queensland, New South Wales.

Queensland:
Burnett, Darling Downs, Leichhardt, Maranoa, Moreton, Port Curtis, South
Kennedy, Warrego, Wide
Bay. New
South Wales
: North
Coast, Northern
Tablelands.

Notes.
Central and south-eastern Queensland to
northern New South Wales.
Acacia communities in rocky areas. Flowering and fruiting January to
November.

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