Aristida echinata

Aristida echinata Henrard. Meded.
Rijks. Herb. Leiden
58A :28 s, t.139 (1932), op.cit.54C:713 (1933).

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

Type of Basionym or
Protologue Information
: LT: W. McComb s.n., Apr. 1918, Queensland:
Warrego Distr,: Morven (K (photo, BRI); IT: BRI). LT designated by Henrard, Meded.
. 54(C): 714 (1933).

Recent synonyms:
Aristida ramosa var. scaberula Henrard.

Key references
(books and floras):
[1981] M.Lazarides in J.Jessop (ed)., Flora of
Central Australia
(451), [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 (128).

[1983] J.C.Tothill & J.B.Hacker, Grasses of Southern Queensland
(106(29)), [2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses
of New South Wales
, 4th edn (128).

Derivation: L. spiny.
Inflorescence a very condensed panicle and the spikelets or auxillary
structures are awned the whole thereby resemble a hedgehog.

Perennial. Culms stature robust to moderate, 50–120 cm tall. Mid-culm
internodes glabrous. Lateral branches branched. Leaf-sheaths antrorsely
scabrous, glabrous on surface. Ligule a fringe of hairs, 0.5 mm long.
Leaf-blades straight, flat or conduplicate or involute or convolute, 6–12 cm
long, 1–2.5 mm wide. Leaf-blade surface scabrous.

Inflorescence compound, a panicle. Panicle linear, 5–15 cm long, 0.8–2 cm wide.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 6.3–10 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
keeled, 1-keeled, 1 -nerved. Upper glume lanceolate, 4–10 mm long, membranous,
keeled, 1-keeled, 1 -nerved. Upper glume surface scabrous.

Fertile lemma 6.3–10 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 5–8 mm long.

: Australasia.

: Queensland, New South Wales.

Darling Downs, Leichhardt, Maranoa, Moreton, Warrego, Wide Bay. New South
: Central Coast, North-Western Slopes, Central-Western Slopes,
South-Western Slopes, North-Western Plains, South-Western Plains, North Far
Western Plains.

A. echinata differs from A. ramosa by the tuberculate surface of
the lemma. It was formerly placed as a variety of A. ramosa (see
comments under that species).

Southern Queensland to
central New South Wales. Acacia, Callitris, blue-grass downs (Dichanthium
spp.), Eucalyptus, and mulga (Acacia aneura) communities on
loams, redearths and sands. Flowering and fruiting August to July.

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