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Description

Plants perennial, loosely cespitose.Culms  5.8-150 cm tall.

Basal leaves: sheaths glabrous or hairy; auricles absent or to 2.4 mm long; ligule 0.2-1.2 mm long, membranous, truncate; blade 1-7 mm wide, flat or rolled, abaxial surface with coarse, long hairs scattered among shorter hairs, adaxial surface with coarse long hairs over the ribs, shorter hairs also present.

Inflorescence 9-38 cm long, often drooping, with 2-20 spikelets, spikelets not pedicellate;  middle internodes 10-15 mm long.

Spikelets solitary, tangential, strongly ascending to appressed, 35-55(100) mm long, with 6-12 florets; disarticulation below the florets.

Glumes unequal, obtuse to acuminate, veins scabrous; lower glume 1.3-12 mm long, 0.8-1.2 mm wide, (2)3-6(7)-veined; upper glume 2-12.6 m long, 4-8-veined. Rachilla internodes with longer hairs at base and tip than in between, the hairs at the tip overlapping the base of the callus above.

Calluses 0.7-0.9 mm long, longer than wide, without a longitudinal furrow or shallowly furrowed distally, base overlapped by hairs of the rachilla segment below.  Lemmas 8-20 mm long, scabrous, tapering into a straight to recurved awn, awn of lowest lemma 7-50 mm long, other awns 9-60 mm long, straight to variously curved. Palea 55-90% the length of the lemma body, keels  coarsely toothed, straight below the tips,tips separated by 0.2-0.4 mm, intercostal region truncate, sometimes protruding slightly. Anthers 0.6-3.9 mm long.

Distribution

AUSTRALIA: Western Australia, South Australia, Victoria, New South Wales.

Ecology

Grows in woodlands, open areas along roads, grassy hillsides, burnt ground, or river flood plains.

Other treatments

Song Wang and Murray Henwood considered treating this as a subspecies of A. scabra (notes by Wang on herbarium specimens in MEL, 1999). The combinations have not been published. Chi Yen includes it, without formal rank, within A. scabra. The epithet scab* was first used in 1810;rectiset* in 1844-47[48]

Comments

Differs from other members of the Anthosachne scabra complex in having long awns on all the florets within each spikelet, including the lower florets.

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Formal citation of name

The combination for this species in Anthosache has not yet been published. It is in a manuscript that Barkworth and Jacobs will submit shortly.

Reference(s)

Jacobs, S.W.L., R.H. D. Whalley, and D.J.B. Wheeler. 2008. Grasses of New South Wales, ed. 4. University of New England, Armidale, New South Wales, Australia.

Wang, S., M.J. Henwood, and C.M. Weiller. 2009. Elymus, pp. 96-99 in Flora of Australia, vol. 44a. Poaceae 2. CSIRO Publishing