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Aristida forsteri

Aristida forsteri B.K.Simon. Austrobaileya
4: 147 (1994).

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

Type of Basionym or
Protologue Information
: Queensland: Darling Downs District: head of
Pariagara Creek, Wondul Range, 28.11S, 151.02E, 12 Apr 1992, P.I.Foster
& P. Machim PIF9793
(HT: BRI; IT: CANB, K, MEL).

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
Australia
.

Illustrations:
[2005] K.Mallet (ed.), Flora of Australia 44B: Poaceae 3 (Fig.
15).

Derivation: in
honor of Paul Irwin Forster (1961-) Australian botanist.

Habit.
Perennial. Culms erect, 25–50 cm tall, 1–1.5 mm diam., 2–3 -noded. Mid-culm
internodes glabrous. Mid-culm nodes glabrous. Lateral branches sparsely
branched. Leaf-sheaths scaberulous, glabrous on surface. Ligule a fringe of
hairs, 0.6 mm long. Leaf-blades straight, conduplicate or involute or
convolute, 7–14 cm long, 1 mm wide. Leaf-blade surface scaberulous, glabrous.

Inflorescence.
Inflorescence compound, a panicle. Panicle linear, 7–13 cm long, 1 cm wide.

Spikelets.
Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 3.5–4.5 mm long.

Glumes.
Glumes similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
1 -nerved. Lower glume surface glabrous. Lower glume apex mucronate. Upper
glume lanceolate, 3.2–4.2 mm long, membranous, 1 -nerved. Upper glume surface
glabrous. Upper glume apex entire, mucronate.

Florets.
Fertile lemma 2.5 mm long, without keel, 3 -nerved. Lemma apex awned, 3 -awned.
Median (principal) awn without a column. Lateral lemma awns present. Anthers 3.
Grain 2 mm long.

Continental
Distribution
: Australasia.

Australian
Distribution
: Queensland.

Queensland:
Darling Downs.

Notes.
Growing with Triodia vella Lazarides.

Restricted
to type locality. Low open heath on shallow soil over sandstone. Flowering and
fruiting 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