Austrostipa platychaeta

Austrostipa platychaeta (Hughes)
S.W.L.Jacobs & J.Everett. Telopea 6: 587 (1996).

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

Basionym and/or
Replacement Name:
Hughes, Bull. Misc. Inform. Kew 1921: 16, f. 17 &
17A (1921).

Type of Basionym or
Protologue Information
: HT: Koch 1133 pro parte, Australia: Western
Australia: Lake Cowcowing (K).

Key references (books
and floras):
[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae
(177 as Stipa platychaeta), [1981] M.Lazarides in J.Jessop (ed)., Flora
of Central Australia
(437 as Stipa), [2002] D.Sharp & B.K.Simon,
AusGrass, Grasses of Australia, [2006] J.Jessop, G.R.M.Dashorst,
F.M.James, Grasses of South Australia (71), [2008] S.W.L.Jacobs,
R.D.B.Walley & D.J.B.Wheeler, Grasses of New South Wales (156),
[2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2

[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australiia, [2006]
J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (71, Fig. 32), [2008] S.W.L.Jacobs,
R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales, 4th edn
(155), [2009]. A.Wilson (ed.), Flora of Australia 44A: Poaceae 2
(31, Fig 4).

Perennial. Rhizomes present, short. Culms erect or geniculately ascending,
60–200 cm tall, wiry or woody, 5–10 -noded. Mid-culm internodes glabrous.
Lateral branches simple or sparsely branched. Leaf-sheaths smooth, glabrous on
surface. Ligule an eciliate membrane, 1–6 mm long, membranous, truncate or
obtuse. Leaf-blades flat or involute, 7–15 cm long, 1–8 mm wide. Leaf-blade
surface glabrous.

Inflorescence compound, a panicle. Panicle lanceolate, 10–40 cm long.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 12–15 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous, much
thinner above, without keels, 3 -nerved. Upper glume lanceolate, 6–10(–12) mm
long, membranous, without keels, 5 -nerved.

Fertile lemma 5 mm long, without keel, 5 -nerved. Lemma surface indumented.
Lemma apex entire or lobed, awned, 1 -awned. Median (principal) awn 60–80(–90)
mm long overall, with a twisted column. Column 10–15 mm long. Palea without
keels. Grain 3–3.5 mm long.

: Australasia.

: Western Australia, South Australia, New South Wales,

Western Australia:
Austin. Eucla, Eyre, Roe, Avon, Coolgardie. South Australia: Lake Eyre,
Nullabor, Gairdner-Torrens Basin, Eastern, Eyre Peninsula, Northern Lofty,
Murray, Yorke Peninsula, Southern Lofty. New South Wales: Central-Western
Slopes, South-Western Slopes, North-Western Plains, South-Western Plains, North
Far Western Plains, South Far Western Plains. Victoria: Lowan Mallee,
Midlands, Murray Mallee, Riverina.

Notes. Plains of New South
Wales and north-western Victoria, across all but the far north of South
Australia, and widespread in southern Western Australia. Usually on sandy soils
in woodland or mallee.

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