Avena sativa*

Avena sativa* L. Sp. Pl.
79 (1753).

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

Type of Basionym or
Protologue Information
: LT: Herb. Clifford. 25, Avena 1, (BM). LT
designated by Baum, Taxon 23: 579–583 (1974).

Key references
(books and floras):
[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 Wales (163), [2009] A.Wilson (ed.). Flora
of Australia
, Vol 44A. Poaceae 2 (123).

[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (208, Fig. 155), [2008] S.W.L.Jacobs, R.D.B.Whalley
& D.J.B.Wheeler, Grasses of New South Wales, 4th edn (163).

Habit. Annual.
Culms erect, 25–125(–180) cm tall. Leaves cauline. Ligule an eciliate membrane,
3–6 mm long, abaxially glabrous or abaxially hairy. Leaf-blades 8–45 cm long,
3–14(–25) mm wide. Leaf-blade surface scaberulous.

Inflorescence compound, a panicle. Panicle pyramidal, effuse, 6–40 cm long,
5–15 cm wide.

Spikelets pedicelled. Fertile spikelets 1 or more flowered, with 1 fertile
floret ((1-)2–3), comprising (1–)2–3 fertile floret(s), with a barren rachilla
extension, cuneate, laterally compressed, 18–32 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
without keels, (7–)8–11 -nerved. Upper glume lanceolate, 22–32 mm long,
membranous, without keels, (7–)10–12 -nerved.

Fertile lemma 15–23 mm long, without keel, 7–9 -nerved. Lemma surface glabrous.
Lemma apex dentate, muticous or awned, 0–1 -awned. Median (principal) awn
dorsal, 15–40 mm long overall, with a twisted column. Palea apex dentate or
lobed. Anthers 3.

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

: Western Australia, South Australia, Queensland, New South
Wales, Victoria, Tasmania, Lord Howe.

Western Australia:
Drummond, Dale, Menzies, Avon. South Australia: North-western, Lake
Eyre, Nullabor, Gairdner-Torrens Basin, Flinders Ranges, Eyre Peninsula,
Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island,
South-eastern. Queensland: Burnett, Moreton, Port Curtis, Warrego. New
South Wales
: Central Coast, Northern Tablelands, Central Tablelands,
Central-Western Slopes, South-Western Slopes. 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: No
region given.

Widely cultivated in temperate regions as a cereal crop or for forage.

All states and territories except the N.T., also on Lord Howe Is. Native of
Europe. Common on roadsides as an escape from cultivation. Flowers Sept.-May.


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