Pentapogon quadrifidus

Pentapogon quadrifidus (Labill.) Baill. Histoire
des Plantes
12: 280 (1893).

Classification. (GPWG 2001) : Subfamily
Arundinoideae. Tribe Poeae.

Basionym and/or
Replacement Name:
Labill., Nov. Holl. Pl. 1: 20, t. 22 (1804).

Type of Basionym or
Protologue Information
: Tasmania: Coll?.

Key references
(books and floras):
[1810]. R.Brown, Prodromus (171 as Agrostis
175), [1878] G.Bentham, Flora Australiensis 7 (572 as Pentapogon
), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
, [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
(235), [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales
(335), [2009] A.Wilson (ed.). Flora of Australia,
Vol 44A. Poaceae 2 (234 & as var. quadrifidus, 235 as var. parviflorus).

[1984] N.T.Burbidge. rev. S.W.L.Jacobs, Australian Grasses  (207), [2006] J.Jessop, G.R.M.Dashorst,
F.M.James, Grasses of South Australia  (236, fig.180 as var. quadrifidus),
[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
, 4th edn (335), [2009]. A.Wilson (ed.), Flora of Australia 44A:
Poaceae 2 (236, Fig.33 as var. quadrifidus).

Perennial. Culms 10–70 cm tall. Leaves cauline. Ligule an eciliate membrane,
0.5–1(–2) mm long, truncate. Leaf-blades filiform, involute or convolute, 2–15
cm long, 0.3–1.5 mm wide. Leaf-blade surface indumented.

Inflorescence compound, a panicle. Panicle linear, 2–10 cm long.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate or obovate, laterally
compressed, 4.3–8 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
keeled, 1-keeled, 1 -nerved. Lower glume apex awned. Upper glume lanceolate,
3–8.1(–10) mm long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume
surface asperulous. Upper glume apex awned.

Fertile lemma 4.3–6(–7) mm long, without keel, 5 -nerved. Lemma apex awned, 5
-awned. Median (principal) awn from a sinus or dorsal, 7–20 mm long overall,
with a twisted column. Lateral lemma awns present.

: Australasia.

: South Australia, New South Wales, Victoria, Tasmania.

South Australia:
Murray, Southern Lofty, South-eastern. New South Wales: Northern
Tablelands, Southern Tablelands. Victoria: Lowan Mallee, Murray Mallee,
Wimmera. Tasmania: Furneaux Group, North East, West Coast, Central
Highlands, Midlands, East Coast.

Infra-specific taxa: var. quadrifidus, var. parviflorus.

Glumes 6.5–10 mm long;
awn to 20 mm long       P. quadrifidus var. quadrifidus     

Glumes 3–5 mm long; awn to
10 mm long                            P. quadrifidus var. parviflorus


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