Aristida vagans

Aristida vagans Cav. Icon. Desc. Pl. 5: 45

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

Type of Basionym or
Protologue Information
: HT: Anon. s.n., Australia: New South Wales:
Central Coast, Port Jackson (MA (photo, BRI)).

Key references
(books and floras):
[1810]. R.Brown, Prodromus (173), [1878]
G.Bentham, Flora Australiensis 7 (562), [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 (132).

[1983] J.C.Tothill & J.B.Hacker, Grasses of Southern Queensland
(104(19)), [1984] N.T.Burbidge. rev. S.W.L.Jacobs, Australian Grasses  (59), [2008] S.W.L.Jacobs, R.D.B.Whalley &
D.J.B.Wheeler, Grasses of New South Wales, 4th edn (132).

Derivation: L.
wander. Culms much branched.

Perennial. Culms 38–85 cm tall, 2–3 -noded. Mid-culm internodes glabrous.
Lateral branches simple or sparsely branched or branched. Leaf-sheaths glabrous
on surface. Ligule a fringe of hairs, 0.5 mm long. Leaf-blades straight, flat
or conduplicate or involute or convolute, 5–12 cm long, 1–1.5 mm wide.
Leaf-blade surface scabrous, glabrous or indumented.

Inflorescence compound, a panicle. Panicle ovate, 6–11.5 cm long, 3–4 cm wide.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 8.5–12 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
keeled, 1-keeled, 1 -nerved. Lower glume apex mucronate. Upper glume
lanceolate, 3.5–7 mm long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume
apex entire or erose.

Fertile lemma 8.5–12 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 6–9 mm long.

: Australasia.

: Queensland, New South Wales.

Burnett, Darling Downs, Moreton, Wide Bay, Port Curtis. New South Wales:
North Coast, Central Coast, South Coast, Northern Tablelands, Central
Tablelands, North-Western Slopes, Central-Western Slopes, North-Western Plains.

A. vagans is similar to A. caput-medusae in having small
spikelets in which the lemma extends beyond the glumes, but it differs from
this species by the inflorescence being larger and irregular in outline.

coastal Australia from south-eastern Queensland to the Victorian border; two
records from outside this range. Eucalyptus communities on rocky and
sandy soils. Flowering and fruiting all year.

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