Flora of North America species comparison

stiffly erect, leafy, triangular, multiribbed.

erect or curved, leafy, filiform, angularly fewribbed.

ascending, overtopped by inflorescence;

blades flat proximally, 3–10(–15) mm wide, apex attenuate, trigonous.

ascending-excurved, overtopped by culm;

blades filiform, involute, apex setaceous.

terminal and axillary, narrow, clusters of corymbs, clusters dense, mostly broadly turbinate, 13–15 mm;

bracteal leaves mostly exceeding subtended compounds.

spikelet clusters 1–2(–3), often sparse, ellipsoid or narrowly turbinate, less than 1 cm wide; subtending foliaceous bracts exceeding compounds.

brown, lanceoloid, 13–15 mm, apex acuminate;

fertile scales lanceolate, 10–13 mm, apex acuminate, midrib shortexcurrent.

erect or ascending, pale redbrown to brown, fusiform, 6–7 mm;

fertile scales elliptic, 4 mm, apex rounded or acute, midrib shortexcurrent or not.

longer perianth bristles usually fully 2 times length of fruit body, antrorsely barbellate.

perianth bristles 6, overtopping tubercle base, mostly retrorsely barbellate, sometimes smooth [forma laeviseta (E.

1–2 per spikelet, 20–25 mm;

body pyriformobovoid, compressed, 5–6 × 2.6–3.6 mm;

tubercle attenuate, 2-grooved, (15–)18–20(–21) mm.

1–4(–5) per spikelet, 2.5–3 mm;

body pale brown, slender stipitate, ellipsoid, lenticular, 1.5–2 × 0.8–1 mm;

surfaces longitudinally minutely striate, obscurely transversely lowrugose, dotted;

tubercle narrowly triangularsubulate, flattened, 0.8–1.7 mm.

.

) Fernald].

= 18.