2n = 42

2n = 56

Open to dense, stiff tufts or small tussocks, 6-35-(55) cm tall; innovations extravaginal. Leaf-sheaths subcoriaceous, distinctly nerved, smooth and glabrous, or sparsely scabrous to densely scaberulous between nerves, light green to light brown, rarely purplish; ligule 0.5-2 mm, truncate, abaxially smooth or rarely sparsely ciliate-scabrous; leafblades 2.5-15 cm × 0.3-1.5 mm, folded with inrolled margins, setaceous to filiform or wiry, abaxially smooth, or rarely scabrous, adaxially scabrous on nerves, margins sparsely scabrous, narrowed to blunt tip. Culms 4-35 cm tall, erect or curved, sometimes geniculate at base, either distinctly scabrous below panicle (most North I. plants), to slightly scabrous near panicle or completely smooth; nodes usually inconspicuous. Panicle 2—5.5—(11) cm × (2)—3—18— (22) mm, ± loosely spiciform, narrowly branched, widest at anthesis, later becoming contracted; rachis, branchlets and pedicels densely scabrous, or rachis smooth, with branchlets scabrous or smooth. Spikelets 3-5.5 mm, greenish or purplish, becoming pale brown. Glumes 1-3-nerved, linear- to elliptic-lanceolate, acute, membranous, often scabrous near tip and on upper part of midnerve. Lemma (2)-2.4- 3.8 mm, usually slightly <¾ length of glumes, submembranous, smooth to finely papillose, sometimes finely scabrous above, ovate-lanceolate, tip hyaline, truncate, denticulate; awn 2-4.5 mm, usually stout and reflexed, projecting from between glumes, occasionally slightly twisted at base, from upper 1/3 of lemma or about mid-dorsal. Palea slightly < to ± = lemma, keels scabrous in upper ½ and interkeels sometimes sparsely scabrous, tip obtuse or bifid. Callus hairs rather dense, 1.5-2.5 mm, c. ½-2/3 length of lemma, very rarely = lemma. Lodicules 0.6- 1 mm, lanceolate, subacute. Rachilla 1-1.5 mm, tipped by a strong tuft of hairs 1-2 mm reaching top of lemma or slightly overtopping lemma. Anthers 0.6-1.4 mm. Caryopsis 1.6-2.2 × 0.4-0.9 mm. Endemic.

Open to dense, stiff tufts or small tussocks, 6-35-(55) cm; branching extravaginal. Leaf-sheath subcoriaceous, distinctly ribbed, smooth, or sparsely scabrid to densely scaberulous between ribs, light green to light brown, rarely purplish. Ligule 0.5-2 mm, truncate, abaxially smooth or rarely sparsely minutely hairy or scabrid. Leaf-blade 2.5-15 cm × 0.3-1.5 mm, folded with inrolled margins, setaceous to filiform or wiry, abaxially smooth, or rarely scabrid, adaxially scabrid on ribs, margins sparsely scabrid, narrowed to blunt tip. Culm 4-35 cm, erect or curved, sometimes geniculate at base, nodes usually inconspicuous, internodes either distinctly scabrid below panicle (most North Id plants), to slightly scabrid near panicle or completely smooth. Panicle 2-5.5-(11) cm × (2)-3-18-(22) mm, ± loosely spiciform, narrowly branched, widest at anthesis, later becoming contracted; rachis, branches and pedicels densely scabrid, or rachis smooth and branches scabrid or smooth. Spikelets 3-5.5 mm, greenish or purplish, becoming pale brown. Glumes 1-3-nerved, linear- to elliptic-lanceolate, acute, membranous, often scabrid near tip and on midnerve above. Lemma (2)-2.4-3.8 mm, usually ± ¾ length of glumes, submembranous, smooth to finely papillose, sometimes finely scabrid above, ovate-lanceolate, apex hyaline, truncate, denticulate; awn 2-4.5 mm, usually stout and reflexed, projecting from between glumes, occasionally slightly twisted at base, from upper ⅓ of lemma or c. middorsal. Palea ˜ lemma, keels scabrid in upper ½, interkeel sometimes sparsely scabrid, apex obtuse or bifid. Callus hairs rather dense, 1.5-2.5 mm, c. ½-⅔ length of lemma, very rarely = lemma. Rachilla prolongation 1-1.5 mm, tipped by a strong tuft of hairs 1-2 mm reaching lemma apex or slightly overtopping lemma. Lodicules 0.6-1 mm, lanceolate, subacute. Anthers 0.6-1.4 mm. Caryopsis 1.6-2.2 × 0.4-0.9 mm.