2n = 28

Reddish green tufts 18—30 cm, with erect culm s topped by dense cylindric panicles and much exceeding the leaves at maturity; branching extravaginal. Leaf-sheath chartaceous, glabrous, light green to light reddish brown, nerves more prominent above. Ligule 2—3 mm, erose, often tapered centrally to a fine tip, abaxially smooth. Leaf-blade 2—9 cm × 1 .5— 2 mm, folded, abaxially smooth, adaxially slightly ridged, sparsely scabrid on ridges; margins finely scabrid; tip hooded. Culm 10—24 cm, erect or geniculate at base, nodes hidden by leaf-sheaths, internode s smooth. Panicle 1 .5—4.5 cm × 5—8 mm, cylindric, dense; rachis smooth, branches and pedicels rather sparsely finely scabrid. Spikelets 5–7 mm, purplish green. Glumes subequal, 1-nerved, submembraneous, elliptic-lanceolate, acute, smooth, kee l finely scabrid on upper 2/3. Lemma 4–5 mm, 4/5 length of glumes, subcoriaceous, smooth below, finely papillose to prickle-toothed above, ± elliptic, apex shortly bifid; awn 3 .5–4.5 mm, from upper ¼ of lemma, twisted about twice at base, ± curved out - wards above. Palea c. 2/3 length of lemma, hyaline, keels thickened, faintly prickle-toothed above. Callus hairs 0 .3–1 mm. Rachilla 0.5–1 mm, bearing minute hairs throughout except at glabrous tip. Lodicules 0 .4–0 .5 mm. Anthers 0.3–0.65 mm. Gynoecium: ovary 0.6 mm; stigma-styles 1.0– 1.5 mm. Caryopsis c. 2 × 0 .6 mm, with dehisced anthers entangled in stigmas. Cleistogamous. Endemic .

Gramen montanum in locis humidis crescens , panicula cylindrica Deyeuxiae quadrisetae et D. avenoidi simile, ab ambobus arista in superiore lemmatis parte exorienti, a D. quadriseta rachilla longiore, et a D. avenoide rachilla glabriore differt. Cleistogamum.

Reddish green tufts 18-30 cm, with erect culms topped by dense cylindric panicles and much exceeding the leaves at maturity; branching extravaginal. Leaf-sheath chartaceous, glabrous, light green to light reddish brown, ribs more prominent above. Ligule 2-3 mm, erose, often tapered centrally to a fine tip, abaxially glabrous. Leaf-blade 2-9 cm × 1.5-2 mm, folded, abaxially smooth, adaxially slightly ribbed, sparsely scabrid on ribs; margins finely scabrid, tip hooded. Culm 10-24 cm, erect or geniculate at base, nodes hidden by leaf-sheaths, internodes glabrous. Panicle 1.5-4.5 cm × 5-8 mm, cylindric, dense; rachis smooth, branches and pedicels rather sparsely finely scabrid. Spikelets 5-7 mm, purplish green. Glumes subequal, 1-nerved, submembranous, elliptic-lanceolate, acute, smooth, keel finely scabrid on upper ⅔. Lemma 4-5 mm, ⅔-⅘ length of glumes, subcoriaceous, smooth below, finely papillose to prickle-toothed above, ± elliptic, apex shortly bifid; awn 3.5-4.5 mm, from upper ¼ of lemma, twisted about twice at base, ± recurved above. Palea c. ⅔ length of lemma, hyaline, keels thickened, faintly prickle-toothed above. Callus hairs 0.3-1 mm. Rachilla prolongation 0.5-1 mm, bearing minute hairs throughout except at glabrous tip. Lodicules 0.4-0.5 mm. Anthers 0.3-0.65 mm. Gynoecium: ovary 0.6 mm; stigma-styles 1.0-1.5 mm. Caryopsis c. 2 × 0.6 mm, with dehisced anthers entangled in stigmas. Cleistogamous.