Poa sieberiana

Poa sieberiana Spreng. Syst.Veg.Cur.Post.35(1827).

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

Type of Basionym or
Protologue Information
: Australia: "Nov. Holl. (P. asutralis Nees in
Sieber agrost. n. 77)", Sieber 77; IT: (IT: BM, GOET-2401, K, MEL,

Recent synonyms:
P. australis auct.

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
, [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
(158), [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales
(354), [2009] A.Wilson (ed.). Flora of Australia,
Vol 44A. Poaceae 2 (319, 320&321 as var. sieberiana, var. cyanophylla,
ana var. hirtella).

[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (158, fig. 111 as var. sieberiana),
[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
, 4th edn (354), [2009]. A.Wilson (ed.), Flora of Australia 44A:
Poaceae 2 (323, Fig. 43 as var. sieberiana, as var. hirtella).

Perennial. Stolons absent or present. Culms erect or geniculately ascending,
9–80 cm tall. Lateral branches simple or branched. Leaves mostly basal.
Leaf-sheaths smooth or scaberulous, glabrous on surface. Ligule a fringed
membrane, a ciliolate membrane, 0.1–2 mm long, abaxially glabrous or abaxially
scaberulous or abaxially hairy, truncate. Leaf-blades straight or curved or
flexuous, filiform, conduplicate or involute, 2.5–60 cm long, 0.2–0.7 mm wide.
Leaf-blade surface scabrous, glabrous or indumented.

Inflorescence compound, a panicle. Panicle pyramidal, 1.5–20 cm long.

Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (2–7), comprising 2–7 fertile floret(s), with diminished florets at the
apex, ovate, laterally compressed, 2.8–8 mm long.

Glumes. Glumes
similar. Lower glume ovate, membranous, keeled, 1-keeled, 1–3 -nerved. Upper
glume ovate, 2–3 mm long, membranous, keeled, 1-keeled, 3 -nerved. Upper glume
surface smooth or asperulous.

Fertile lemma (1.8–)2.2–3.2 mm long, keeled, 5 -nerved. Lemma surface
indumented. Lodicules present. Anthers 3. Grain 1.5 mm long.

: Australasia.

: Queensland, New South Wales, Victoria, Tasmania.

Darling Downs, Moreton. New South Wales: North Coast, Central Coast,
South Coast, Northern Tablelands, Central Tablelands, Southern Tablelands,
North-Western Slopes, Central-Western Slopes, South-Western Slopes,
North-Western Plains, South-Western Plains. Victoria: East Gippsland,
Eastern Highlands, Gippsland Highlands, Gippsland Plain, Grampians, Lowan
Mallee, Midlands, Otway Plain, Otway Range, Wilsons Promontory, Riverina,
Snowfields, Volcanic Plain, Wannon, Wimmera. Tasmania: North West, North
East, West Coast, Central Highlands, Ben Lomond, East Coast, South West.

Notes. Endemic.

var. sieberiana, var. cyanophylla, var. hirtella.

1.Spikelets 4.3–5.7 mm
long, stiff                                     P. sieberiana var. sieberiana          

 Spikelets 3–3.4 mm long, not stiff                                           2             

2.Leaf blades 25 mm
long, adaxially glabrous                      P. sieberiana var. cyanophylla      

 Leaf blades 80–340 mm long, adaxially
puberulous          P. sieberiana var. hirtella

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