Grass related to D. billardieri (R.Br.) Kunth. Culms caespitose, erect to decumbent at base, leafy, 15-30 cm long. Leaf blade erect-spreading 5-10 cm long. somewhat involute to subulate, glabrous, green, 5-9 costate on adaxial side. Leaf sheath 3-10 cm long, cylindrical, uppermost sheath elongated ± turgid, pale green. Ligule 1-3 mm long, subacute, membranous. Panicle 6-12 cm long, sparsely branched, effuse, base included in sheath; branchlets capillary, somewhat scabrid. Pedicells 2-15 mm long, incrassate above, scabrid. Spikelets one-flowered, rachilla produced beyond floret, l1.5 mm long, plumose. Glumes c. 4 mm long, lanceolate, very acute, keeled, keels scabrid. Lemma 2.5 mm long, 5-nerved, middle nerve produced into awn from below the middle of lemma, ovate-lanceolate, sharply 4-dentate, somewhat indurate, scabrid, short hairy on callus. Awn c. 5 mm long, slender, geniculate, scabrid. Palea 2 mm long, oblong, bifid. Stamens 3. Ovary glabrous; styles 2, plumose. Caryopsis free, 2 mm long, oblong to ± fusiform, hard light brown, translucent.

Gramen D. billardieri (R.Br.) Kunth affinis. Culmi caespitosi, erecti vel basi decumbentes, foliosi, 15-30 cm longi. Foliorum laminae erecto-patentes 5-10 cm longae, paulo involutiores vel subulatiores, galbrae, 5-9 costatae in adaxali latere, virides. Vaginae 3-10 cm longae, cylindratae, vaginae summae elongatae, plus minusve turgidae, pallide virides. Ligula subacuta, scariosa, 1-3 mm longa. Panicula 6-12 cm longa, parce ramosa, effuse, paniculae basis in superiore vagina inclusa; ramuli capillares, paulo scabridiores. Pedicelli 2-15 mm longi, supreme incrassati, scabridi. Rachilla praeter flosculum producta, 1.5 mm longa, plumosa. Glumae c. 4 mm longae, lanceolatae, acutissimae, carinatae, carinae scabridae. Lemma 2.5 mm longum, 5-nerve, medio nervo in aristam producto ex inferiore parte lemmatis, ovato-Ianceolatum, acutissimum, quadridentatum, paulo induratius, scabridum; callus brevibus pilis. Arista c. 5 mm longa, gracilis, geniculata, scabrida. Palea 2 mm longa, oblonga, bifida. Stamina 3. Ovarium glabrum; styli 2 plumosi. Caryopsis libera, 2 mm longa, oblong vel ± fusiformis, dura, paelide fusca, translucida.

Grass perennial, densley tufted, 10-20 cm tall. Culms profusely branched, lower branches intravaginal or extravaginal, upper branches intravaginal. Internodes about 10, 1-1.5 cm long. Leaf sheath 2-3 cm long ± compressed, distinctly nerved, smooth, glabrous, scarious margin distinct. Leaf blade 1.5-3 cm long, flat, ± strict, linear, tip acute, white, somewhat incurved; glabrous, ± scabrid on margins at base. Ligule 0.5 mm long, truncate to obtuse membranous, entire. Peduncles 6-12 cm long, glabrous smooth. Panicle 2-4 cm long, 2-4 cm wide, pyramidal; lower branches in whorls of 2, widespreading, minutely scabrid, bearing 3-5 spikelets; pedicels 3-6 mm long. Spikelets 2 mm long, turgid, 2-flowered. Rachilla internodes c. 0.5 mm long above each floret. 1st glume 0.6 mm long, triangular, subacute, 1-nerved, smooth. 2nd glume 0,8 mm long, broad, ovate, retuse, 3-nerved. Lemma 1.4 mm long, ovate, keeled, obtuse to truncate at apex, glabrous, scabrid on keel near apex, 3-nerved, scarious margin narrow. Palea 1.4 mm long, ovate, two keeled, glabrous scabrid on keels above. Caryopsis 1.1 mm long broad-oblong, pointed above and below, free.

Gramen perenne, dense caespitosum, 10-20 mm altum. Culmi copiose divisi, ramis inferioribus intravaginalibus vel extravaginalibus, ramis superioribus intravaginalibus. Internodia circiter 10, 1-1.5 mm longa Vagina 2-3 cm longa, ± compressa, distincte nervosa, laevis, glabra, margine distincte scarioso. Lamina 1.5-3 cm longa, plana, ± stricta, linearis, apice aeuto, albo, subineurvato, glabra, marginibus ad basin ± seariosis. Ligula 0. 5 mm longa, truneata vel obtusa, membranacea, integra. Pedunculi 6-12 cm longi, glabri, laeves. Panicula 2-4 cm longa, 2-4 cm lata, pyramidalis; ramis inferioribus 2-verticillatis, patentibus, minute scabrids, spiculas 3-5-gerentibus; pedicelli 3-6 mm longi. Spiculae 2 mm longae, turgidae, 2-florae. Rhachillae internodia c. 0.5 mm longa. Gluma inferior 0.6 mm longa, triangularis, subacuta, 1-nervis, laevis. Gluma superior 0.8 mm longa, lata, ovata, retusa, 3-nervis. Lemma 1.4 mm longum, ovatum, carinatum, ad apicem obtusum vel truncatum, glabrum, carina prope apicem scabrida, 3-nerve, marginibus scariosis angustis. Palea 1.4 mm longa, ovata, bicarinata, glabra, carinis supra scabridis. Caryopsis 1,1 mm longa, late oblonga, apice basique acuta, libera.

Plant perennial, loosely tufted c. 20-30 cm tall. Culms sparingly branched, lower branches intravaginal and extravaginal, upper intravaginal. Internodes about 8, lower 2-4 cm long. Leaves ± glaucous; sheath 3-6 cm long, distinctly nerved, smooth, glabrous, scarious margin distinct; leaf blade 6-12 cm long 2-3 mm wide, flat, ± tapering, glabrous scabrid on margins and above nerves; ligule 0.5-1 mm long obtuse to subacute membranous. Peduncles rather short (specimens immature). Panicles e. 8 cm long, lax, spreading; lower branches in whorls 2-4 strongly scabrid, bearing 5-10 spikelets. Spikelets c. 3,5 mm long, ± compressed 4-flowered; rachilla internodes c. 4 mm long. 1st glume c. 0.5 mm long, acute, 1-nerved, somewhat scabrid. 2nd glume 1.0-1.5 mm long, acute, 3-nerved, ± scabrid on nerves. Lemma 3-nerved, smooth, very acute; lower lemma c. 2.5 mm long, upper smaller. Palea c. 1.5 mm long, 2-keeled, short ciliate on keels.

Gramen perenne, laxe caespitosum, 20-30 cm altum. Culmi sparse divisi, ramis inferioribus intravaginalibus. vel extravaginalibus, ramis superioribus intravaginalibus. Internodia circiter 8, inferiore 2-4 cm longo. Folia ± glauca; vagina 3-6 cm longa, distincte nervosa laevis, glabra, margine distincte scarioso; lamina 6-12 cm longa, 2-3 mm lata, plana, sensim attenuata, glabra, margines nervosque secundum scabrida; ligula 0.5-1 mm longa, obtusa vel acuta, membranacea. Pendunculi breviculi (specimina immatura). Panicula circiter 8 cm longa, laxa, ramis inferioribus 2-4-verticillatis, patentibus, valde scabrids, 5-10 spiculas gerentibus. Spiculae circiter 3. 5 mm longae, compressae, 4-florae. Rachillae internodia circ. 4 mm longa. Gluma inferior circ 0. 5 mm longa, acuta, 1-nervis, plus minusve scabrida. Gluma superior 1.0-1.5 mm longa, acuta, 3-nervis, nervi scabridi. Lemma 3-nerve, glabra, valde acuta; lemma inferior circ. 2. 5 mm longa, lemma superior minus. Palea circ. 1.5 mm longa, bicarinata, carinis scabridis.

Grass 20-40 cm tall, laxly tufted, ± decumbent, with ± distinct to elongate slender rhizomes glabrous. Culms branched at base, branches mostly extravaginal, lower internodes shorter than leaf sheaths, peduncle exceeds leaf blades. Leaf sheath ± compressed, distinctly nerved, smooth. Leaf blade 10-20 em long, 2-3 mm wide when flat, flat or folded, linear, tip acute, smooth on abaxial side, ± scabrid on adaxial side. Ligule 1-1.5 mm long, obtuse, membranous ± entire. Panicle 5-10 cm long slender, nodding rachis and branchlets smooth, branchlets short. Spikelets shortly pedicellate to subsessile, 7-9 mm long, oblong-ovate, 4-6 flowered. Glumes narrow ovate-Ianceolate, acute, 3-nerved, keeled, 4, 5-5 mm long, subequal, ± scabrid on keels above. Lemma 5-6 mm long, broad-lanccolate, strongly acute, keeled, 5-nerved, nerves ± prominent, middle and outer nerves scabrid above, lanate below. Palea narrow, 2-nerved, nerves softly ciliate-dentate.

Gramen 20-40 cm altum, laxe eaespitosum, ± decumbens, rhizomatibus tenuis breviusculis vel elongatis, glabrum. Culmi ima basi divisi, rami plerumque extravaginales, internodia inferiora vaginis breviora, pedunculus laminis longior. Vagina ± compressa, distincte striata, laevis. Lamina 10-20 cm longa, plana vel plicata, 2-3 mm lata dum plana, linearis, apice acuto, infra glaba, supra ± scabrida. Ligula 1-1.5 mm longa, obtusa, membranacea, ± integra. Panicula 5-10 cm longa, gracilis, rachi nutante, ramulis glabris, brevibus. Spiculae breviter pedicellatae vel subsessiles, 7-9 mm longae, oblong-ovatae, 4--6 florae. Glumae angustae, ovato-Ianceolatae, acutae, trinerves, carinatae, 4.5-5 mm longae, subaequales, ad apicem carinae ± scabridae. Lemma 5-6 mm longum, late lanceolatum, peracutum, carinatum, quinquenerve, nervis ± distincts, mediis et lateralibus nervis supra scabrids, infra lanatis. Palea angusta, binervis, nervis leviter ciliato-dentatis.