Avena fatua*

Avena fatua* L. Sp. Pl.
 80 (1753).

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

Type of Basionym or
Protologue Information
: Herb. Linn. 95/9 (LINN lecto).

Key references
(books and floras):
[1878] G.Bentham, Flora Australiensis 7 (588),
[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (37),
[1981] M.Lazarides in J.Jessop (ed)., Flora of Central Australia (434),
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia, [2006]
J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia (208),
[2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses of New South
(162), [2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae
2 (126).

[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (38,
Pl. 9), [1983] J.C.Tothill & J.B.Hacker, Grasses of Southern Queensland
(122), [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
 (208, Fig. 154), [1984]
N.T.Burbidge. rev. S.W.L.Jacobs, Australian Grasses  (71), [2008] S.W.L.Jacobs, R.D.B.Whalley &
D.J.B.Wheeler, Grasses of New South Wales, 4th edn (162), [2009].
A.Wilson (ed.), Flora of Australia 44A: Poaceae 2 (162, Fig.24).

Habit. Annual.
Culms erect or geniculately ascending, 30–125(–160) cm tall, 3–5 -noded. Leaves
mostly basal or basal and cauline or cauline. Ligule an eciliate membrane, 4–6
mm long, abaxially hairy. Leaf-blades 10–45 cm long, 3–15 mm wide. Leaf-blade
surface scaberulous.

Inflorescence compound, a panicle. Panicle pyramidal, 7–40 cm long, 5–20 cm

Spikelets pedicelled. Fertile spikelets 1 or more flowered, with 1 fertile
floret (2–3), comprising 2–3 fertile floret(s), with a barren rachilla extension,
cuneate, laterally compressed, 18–30 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
without keels, 7–11 -nerved. Upper glume lanceolate, 18–30 mm long, membranous,
without keels, 7–11 -nerved.

Florets. Fertile
lemma 14–22 mm long, without keel, 7–9 -nerved. Lemma surface indumented. Lemma
apex dentate, awned, 1 -awned. Median (principal) awn dorsal, 25–48 mm long
overall, with a twisted column. Palea apex entire or dentate. Anthers 3. Grain
6–8 mm long.

: Europe, Africa, Temperate Asia, Tropical Asia, Australasia,
Pacific, North America, South America, and Antarctica.

: Western Australia, Northern Territory, South Australia,
Queensland, New South Wales, Victoria, Tasmania.

Western Australia:
Austin. Irwin, Drummond, Avon. Northern Territory: Central Australia
North, Central Australia South. South Australia: Lake Eyre, Nullabor,
Gairdner-Torrens Basin, Flinders Ranges, Eastern, Eyre Peninsula, Northern
Lofty, Yorke Peninsula, Southern Lofty, South-eastern. Queensland:
Darling Downs, Maranoa, Moreton, Warrego, Wide Bay. New South Wales:
Central Coast, South Coast, Southern Tablelands, North-Western Slopes,
South-Western Slopes, North-Western Plains, South-Western Plains, North Far
Western Plains. Victoria: East Gippsland, Eastern Highlands, Gippsland
Highlands, Gippsland Plain, Grampians, Lowan Mallee, Midlands, Murray Mallee,
Otway Plain, Otway Range, Wilsons Promontory, Riverina, Snowfields, Volcanic
Plain, Wannon, Wimmera. Tasmania: North West, East Coast, South West.

Introduced. All Australian states and territories. Probably native to the
Mediterranean but widely naturalized. Common weed of disturbed ground and
cereal crops. Flowers July-Dec. Fruits ?-Dec.


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