Flora of North America species comparison

erect, glabrous.

erect, pubescent or subglabrous, hairs spreading.

alternate;

sessile or subsessile;

blade spatulate proximally to linear or narrowly elliptic distally, (5–)10–20(–40) × (0.5–)1–3(–5) mm, base acute or obtuse, apex acute to acuminate, surfaces glabrous.

whorled, at least proximally;

sessile or subsessile;

blade narrowly oblanceolate-spatulate to linear or scalelike, 3–25 × 0.5–2(–5) mm, base cuneate, apex rounded or acute, surfaces pubescent.

capitate to densely cylindric, (0.5–)1–2(–4) × 0.5–1.4 cm;

peduncle 0.3–2.5(–3) cm;

bracts subpersistent to tardily deciduous, subulate.

cylindric, 1–3 × 0.5 cm;

peduncle to 1 cm;

bracts deciduous, narrowly ovate.

0.4–1.5 mm, glabrous.

0.5–1 mm, glabrous.

usually pink, purple, or reddish purple, rarely white, sometimes greenish tinged, sepals sometimes pink or white, 4–6 mm;

sepals oval, elliptic-ovate, or lanceolate, 1–3 mm;

wings ovate to broadly elliptic, (2.6–)4.5–6.3 × (1–)2.5–3.5 mm, apex obtuse to broadly rounded, sometimes minutely apiculate, rarely acute;

keel 2.5–3 mm, crest 2-parted, with 2–4 lobes on each side.

pink, purple, or white, 2.5–4.5 mm;

sepals ovate to elliptic, 0.5–1 mm;

wings mostly elliptic, to ovate or obovate, 3–5 × 2–3 mm, apex acute or obtuse;

keel 2.7–3.8 mm, crest 2-parted with 2–4 entire or 2-fid lobes on each side.

usually with flattened, sterile base, cuneate-subglobose, 2.5–3 × 2–2.5 mm, margins not winged (sometimes with raised rim).

ellipsoid, 1.5–2 × 1 mm, margins not winged.

1.3–1.7 mm, pubescent;

aril 1–1.3 mm, lobes usually (1/2–)2/3 to ± length of seed, rarely minute.

0.7–1.1 mm, pubescent, hairs glochidiate;

aril vestigial or, rarely, to 0.1 mm, unlobed.