Austrostipa plumigera

Austrostipa plumigera (Hughes)
S.W.L.Jacobs & J.Everett. Telopea 6: 588 (1996).

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

Basionym and/or
Replacement Name:
 Stipa plumigera
Hughes, Bull. Misc. Inform. Kew 1921: 20, f. 25 & 25A (1921).

Type of Basionym or
Protologue Information
: HT: R. Helms s.n., 29 Jun 1891, Australia:
South Australia: Elder Exploring Expedition, Camp 10, 27.16S 130.04E (K;
IT(probable): AD-97434003, AD-97424088, MEL-59969, NSW-1513321, NSW-15121,
NSW-16019, NSW-16020, NSW-16021).

Key references
(books and floras):
[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
(99), [2009] A.Wilson (ed.). Flora of Australia,
Vol 44A. Poaceae 2 (57).

[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (99, fig. 61), [2009]. A.Wilson (ed.),
Flora of Australia
44A: Poaceae 2 (18, fig.2I).

Perennial. Rhizomes present, short. Culms 30–60 cm tall, 2–3 -noded. Mid-culm
nodes pubescent. Leaf-sheaths hairy. Ligule a fringed membrane, a ciliate
membrane, 0.5–2.5 mm long, truncate or acute. Leaf-blades flat, 15–35 cm long,
2–3 mm wide. Leaf-blade surface indumented.

Inflorescence compound, a panicle or a panicle. Panicle linear, 10–20 cm long.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 20 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous, much
thinner above, without keels, 3 -nerved. Upper glume lanceolate, 12–15 mm long,
membranous, without keels, 5 -nerved.

Fertile lemma 8 mm long, without keel. Lemma surface indumented. Lemma apex
lobed, awned, 1 -awned. Median (principal) awn 70–110 mm long overall, with a
twisted column. Column 20–26 mm long. Palea without keels. Grain 3.5–4 mm long.

: Australasia.

: Western Australia, South Australia.

Western Australia:
Eucla. South Australia: North-western, Nullabor, Gairdner-Torrens Basin,
Eyre Peninsula.

Notes. Distinctive in the
entire awn being plumose, with hairs 0.5–1 mm long.

North-western South Australia and
the Nullarbor Plain, extending into Western Australia.

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