Triodia danthonioides

Triodia danthonioides (F. Muell.) M. Lazarides. Austral. Syst. Bot. 10: 427–428 (1997).

Classification. (GPWG 2001) : Subfamily Chloridoideae. Triodeae.

Basionym and/or
Replacement Name:
F. Muell., Fragm. 8: 125 (1873).

Type of Basionym or
Protologue Information
: Western Australia: South-West Province; Swan River,
J. Drummond 345 (HT: MEL, 3 sheets; IT: K, Perth(photo)).

Recent synonyms:
Plectrachne danthonioides.

Key references
(books and floras):
[1878] G.Bentham, Flora Australiensis 7 (604 as Triraphis),
[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (81 as
Plectrachne), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of

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

Perennial. Culms erect, 60–200 cm tall. Mid-culm internodes woolly. Lateral
branches simple. Leaf-sheaths hairy. Leaf-sheath auricles absent. Ligule a
fringe of hairs. Leaf-blades recurved, curved or flexuous, aciculate,
conduplicate, 25–60 cm long, 1.3–2 mm wide. Leaf-blade surface indumented.

Inflorescence compound, a panicle. Panicle linear, 15–60 cm long, 3–11 cm wide.

Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (5–6), comprising 5–6 fertile floret(s), with diminished florets at the
apex, elliptic, laterally compressed, 9–20 mm long.

Glumes similar. Lower glume lanceolate, membranous or scarious, without keels,
3(–5) -nerved. Lower glume surface glabrous. Lower glume apex muticous or
mucronate. Upper glume lanceolate, 10–18.5 mm long, membranous or scarious,
without keels, 3(–5) -nerved. Upper glume surface glabrous. Upper glume apex
entire or with a unilateral tooth or lobed, muticous or mucronate.

Fertile lemma 8–9 mm long, without keel, 3–15 -nerved. Lemma surface
indumented. Lemma apex lobed, awned, 3 -awned. Median (principal) awn 15 mm
long overall. Lateral lemma awns present. Palea 2 -nerved. Lodicules present.
Anthers 3.

: Australasia.

: Western Australia.

Western Australia:
Carnarvon. Irwin, Drummond, Avon.

Diagnostic characters include the retrorsely scabrous palea keels; lemmas with
usually 5 linear series of hairs; robust habit with extremely long panicle and
blades; dense woolly indumentum on culms and foliage; hairy, usually bifid

South-West Province and adjacent areas in the Eremaean Province, W.A. In red,
yellow or brown, often deep sands and sandy loams on plains and dunes, with
heath and shrublands; also an lunette around salt lake; flowers July-Nov.
(winter and spring).


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