Culm |
Densely tufted, 8–15 cm long, hairy. |
Densely tufted, 8–36 cm
long, glabrous. |
Few, slender, 10–25 cm long, hairy. |
Leaves |
Hairy on both surfaces |
Glabrous on both surfaces |
Hairy on
both surfaces |
Inflorescence |
Decompounds corymb, loose, to 5 cm long, few to numerous
spikelets. |
Decompounds corymb, loose, 4–10 long, bearing 70–90
spikelets. |
Simple to compound, very loose, 4–6 cm long, bearing
10–20 spikelets. |
Spikelets |
Solitary, angular, ovoid or oblong-lanceolate, 2–5 × 1–1.5
mm, acute at apex, greenish-brown, densely to 40-flowered. |
Solitary,
angular, oblong-ovoid or ellipsoid, 2.5–4 × 1–1.3 mm, acute at apex,
creamy-greenish, 6–19-flowered. |
solitary, terete, oblong, elliptic to
lanceolate, 3-4 × 0.5–1.0 mm, acute at apex, yellow to brownish,
8-14-flowered. |
Glumes |
Membranous, spiral, ovate, 1.2-1.5x ca. 0.7 mm, acute at apex,
glabrous, keeled, nerveless. |
Membranous, spiral, elliptic or
ovate-lanceolate, 1.3–1.6 × 0.6–1 mm, keeled, nerveless. |
membranous,
distichous or lower 2 or 3 spiral, oblong-ovate, 1.5–2 × 1–1.3 mm,
acute at apex, glabrous (lower 2 or 3 puberulent), keeled,
3-nerved. |
Stamen |
One |
One |
One or two |
Style |
Flat, ciliate towards the top |
Glabrous throughout |
Triquetrous, pubescent throughout |
Achene |
Obovate-elliptic, 0.5–0.8 × 0.2–0.3 mm, brownish, smooth,
rounded at apex. |
obovate, 0.5–0.7 × 0.3–0.4 mm, smooth, rounded at
apex. |
Obovate, 3.0–5.0 × 2.5–3.0 mm, sparsely tuberculate, depressed
at apex. |