Anthoxanthum aristatum*

Anthoxanthum aristatum* Boiss. Voy. Bot. Espagne 2: 638 (1842).

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

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
, [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales
, [2009] A.Wilson (ed.). Flora of Australia, Vol
44A. Poaceae 2 (144).

Derivation: L. arista,
bristle; -ata, possessing. The apices of lemmas, paleas or glumes drawn
out into a distinct awn.

Habit. Annual.
Culms erect or geniculately ascending, stature slender to delicate, 10–60 cm
tall, 4–7 -noded. Lateral branches sparsely branched or branched. Leaves mostly
basal. Ligule an eciliate membrane, 1.5–3 mm long. Leaf-blades 0.8–6 cm long,
1–5 mm wide. Leaf-blade surface glabrous or indumented.

Inflorescence compound, a panicle. Panicle oblong or ovate, 1–4 cm long,
0.3–1.2 cm wide.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 2 basal sterile
florets, comprising 1 fertile floret(s), without rachilla extension,
lanceolate, laterally compressed, 5–7.5(–8) mm long.

Glumes dissimilar, thinner than fertile lemma, shiny. Lower glume ovate,
membranous, keeled, 1-keeled, 1 -nerved. Lower glume surface glabrous. Lower
glume apex muticous or mucronate. Upper glume elliptic, 5–7.5(–8) mm long,
membranous, keeled, 1-keeled, 3 -nerved. Upper glume surface glabrous. Upper
glume apex muticous or mucronate. Florets. Basal sterile florets 2 or
more, barren, without significant palea. Lemma of lower sterile floret 50 % of
length of spikelet, membranous, 1-keeled, 4–5 -nerved, awned. Lemma of upper
sterile floret 3–4 mm long, erose, awned.

Fertile lemma
(1.4–)1.6–2.1 mm long, without keel, 5 -nerved. Palea 1 -nerved, without keels.
Lodicules absent or vestigial. Anthers 2.

: Europe, Africa, Temperate Asia, Australasia, and North

: Victoria.


Introduced. Recorded only from Vic. Endemic to SW Europe. Flowers Dec.-Jan.

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