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Genus Astrebla Family Poaceae

Description: Strongly tufted perennials or annuals with erect or ascending culms arising from scaly bases.

Leaves with ligule a ciliate rim; blade rolled in the bud.

Inflorescence a terminal spike or spike-like raceme, solitary or paired.

Spikelets sessile or subsessile, solitary, overlapping, on 1 side of the axis, rachilla disarticulating above the glumes but not between the lemmas; florets 2–9, bisexual, the uppermost often reduced. Glumes slightly unequal, keeled, acute, linear to elliptic. Lemmas longer than the glumes, leathery, deeply 3-lobed, rounded on the back, hairy at the base, central nerve extended into a firm, often curved, awn. Palea shorter than the lemma, 2-keeled; keels ciliate.

Distribution and occurrence: World: 4 species, endemic Australia. Australia: all mainland States except Vic.

Text by S. W. L. Jacobs & S. M. Hastings
Taxon concept:

 Key to the species 
1Spike or raceme 2–3 mm wide (including spikelets), the spikelets with 2–4 florets and rachilla internodes 2–4 mm longAstrebla elymoides
Spike or raceme 5–30 mm wide (including spikelets), the spikelets with 3–9 florets and rachilla internodes 1 mm long or less2
2Lobes of the lemma all similar, the lemma villous on and around the lateral nerves onlyAstrebla squarrosa
Lobes of the lemma dissimilar, the middle lobe alone tapering into a sharp point; body of the lemma villous all over the back
                       Back to 1
3Spikelets densely overlapping; the outer lobes of the lemma with scarious margins at least 50% the length of the lemma; lower glume 5–9-nervedAstrebla pectinata
Spikelets loosely overlapping; the outer lobes of the lemma firmer in texture and with narrow scarious margins less than 50% the length of the lemma; lower glume 1–3-nerved.
                       Back to 2
Astrebla lappacea

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