Flora of North America species comparison

erect, sometimes slightly glaucous, glabrous.

erect, glabrous.

usually whorled proximally, sometimes whorled to inflorescence, opposite to alternate distally, rarely alternate throughout;

sessile or subsessile, petiole rarely to 1 mm;

blade sometimes linear-spatulate proximally, usually linear, linear-oblong, -elliptic, or -lanceolate distally, (5–)10–20(–30) × 0.5–5.5 mm, base cuneate to acute, apex acute to acuminate, surfaces glabrous.

alternate;

sessile or subsessile;

blade linear to narrowly elliptic proximally, or linear-subulate distally, 6–23 × (0.5–)1(–2) mm, base cuneate, apex acute to acuminate, surfaces glabrous.

nearly spikelike, conic to cylindric-conic, 0.5–5 × 0.2–0.6 cm, sometimes interrupted proximally, with some proximal fruits persistent below gap;

peduncle to 9 cm (usually elongate);

bracts deciduous, subulate to lanceolate.

capitate to densely cylindric, 0.7–3(–4) × 0.6–1.3 cm;

peduncle 0.3–2 cm;

bracts persistent, often with scattered deciduous ones as well, lanceolate-ovate.

0.2–1(–2) mm, glabrous.

0.7–1.6 mm, glabrous.

white or with greenish or pinkish tinge, sepals sometimes purplish or whitish, 1–2.2(–2.6) mm;

sepals ovate or elliptic to lanceolate, 0.5–1.6 mm, ciliate;

wings suborbiculate, ovate, elliptic, or obovate, 1–2.6 × 0.8–2.5 mm, apex obtuse to bluntly rounded;

keel 1.2–1.8 mm, crest 2-parted, with 1 or 2 lobes on each side.

pink or pale purple, 2.8–4 mm;

sepals ovate or lanceolate-ovate, 0.6–1.3 mm;

wings ovate or elliptic, 2.5–3.3(–3.8) × 1.7–2 mm, apex obtuse to bluntly rounded;

keel 2.8–4 mm, crest 2-parted, with 1 lobe on each side, other lobes reduced to low, blunt processes.

subglobose or broadly ellipsoid to ovoid, 1.3–2.4 × 0.7–2.2 mm, margins not winged.

subglobose, 1.5–2.3 × 1.5–2.3 mm, margins not winged.

1.2–2.2 mm, pubescent;

aril 0.5–1 mm, lobes 1/3–1/2 length of seed.

1–1.5 mm, pubescent;

aril 0.5–0.8 mm, lobes 1/3–1/2 length of seed.

= 34.

= 72.